Crawled vehicle for the preparation of ski pistes; the crawled vehicle comprising a frame; two wheels assemblies displaced at opposite side with respect to the frame; two crawls, each of them wounded respectively around to one of the two wheels assemblies; and at least one supporting device, for each wheels assemblies, coupled to at least two wheels of the wheel assembly and connected in an articulated jointed manner to the frame for coupling the at least two wheels of the wheels assembly to the frame; wherein the supporting device has a first supporting element, which supports one of the at least two wheels of the wheels assembly; and a second supporting element, which supports another of the two wheels of the wheels assembly; and wherein the first supporting element and the second supporting element are connected to one another through a first articulated joint in a first point.

A track system for traction of a vehicle, such as an all-terrain vehicle (ATV), an agricultural vehicle, etc. The track system comprises a track and a track-engaging assembly for driving and guiding the track around the track-engaging assembly. The track system may be configured to facilitate adjustment of certain aspects of its operation, including, for example, how it is positioned and/or can move relative to a frame of the vehicle, based on one or more factors, such as, for instance, a user's preferences (e.g., riding style, desire to feel the ground, etc.), an environment of the track system (e.g., a profile of the ground, such as a slope or steepness or a levelness of the ground; a compliance of the ground, such as a softness or hardness of the ground, etc.), a state of the track system (e.g., a speed and/or a direction of motion of the track, etc.), a state of the vehicle (e.g., a speed and/or direction of the vehicle, etc.), and/or any other suitable factor. For instance, the track system may comprise a control mechanism configured to adjust an anti-rotation device that is configured to restrict movement of the track system relative to the frame of the vehicle. The control mechanism may be configured to adjust the anti-rotation device in response to a command, which may be input via a user interface or automatically generated by a controller.

A track system for traction of a vehicle, such as an all-terrain vehicle (ATV), an agricultural vehicle, etc. The track system comprises a track and a track-engaging assembly for driving and guiding the track around the track-engaging assembly. The track system may be configured to facilitate adjustment of certain aspects of its operation, including, for example, how it is positioned and/or can move relative to a frame of the vehicle, based on one or more factors, such as, for instance, a user's preferences (e.g., riding style, desire to feel the ground, etc.), an environment of the track system (e.g., a profile of the ground, such as a slope or steepness or a levelness of the ground; a compliance of the ground, such as a softness or hardness of the ground, etc.), a state of the track system (e.g., a speed and/or a direction of motion of the track, etc.), a state of the vehicle (e.g., a speed and/or direction of the vehicle, etc.), and/or any other suitable factor. For instance, the track system may comprise a control mechanism configured to adjust an anti-rotation device that is configured to restrict movement of the track system relative to the frame of the vehicle. The control mechanism may be configured to adjust the anti-rotation device in response to a command, which may be input via a user interface or automatically generated by a controller.

A torsion bar restraint system for tracked combat vehicles that aids in the improvement of occupant survival rates when associated with asymmetric threats. The blast mitigating restraint system can reduce the dynamic deflection of torsion bars based on the severity of the blast impulse as needed. Systems comprise one or more components that secure the torsion bar to the hull for protecting against dynamic deflection and lateral displacement. The two disclosed components, an end restraint device and an M-Ring restraining device, can be used in conjunction or independently from each other based on the type of threat likely to be encountered.

A snow bike track assembly includes a frame assembly, at least one strut, an endless track, a plurality of top and bottom rollers, a skid rail assembly, a drive assembly, and a swing arm assembly. The frame assembly is configured to connect to a frame of a motorcycle in place of a rear wheel of the motorcycle. The at least one strut is connected to the frame assembly and configured to connect to the motorcycle frame in place of a rear shock of the motorcycle. The plurality of top rollers are mounted to the frame assembly and arranged to support the endless track. The plurality of lower rollers are mounted to the skid rail assembly and arranged to support the endless track. The drive assembly is configured to drive the endless track. The swing arm assembly is coupled between the frame assembly and the skid rail assembly.

A snow bike track assembly includes a frame assembly, at least one strut, an endless track, a plurality of top and bottom rollers, a skid rail assembly, a drive assembly, and a swing arm assembly. The frame assembly is configured to connect to a frame of a motorcycle in place of a rear wheel of the motorcycle. The at least one strut is connected to the frame assembly and configured to connect to the motorcycle frame in place of a rear shock of the motorcycle. The plurality of top rollers are mounted to the frame assembly and arranged to support the endless track. The plurality of lower rollers are mounted to the skid rail assembly and arranged to support the endless track. The drive assembly is configured to drive the endless track. The swing arm assembly is coupled between the frame assembly and the skid rail assembly.

An improved suspension system for a track-driven work vehicle includes a roller beam and at least one roller wheel assembly coupled to the roller beam. The roller wheel assembly includes an inboard roller shaft, an inboard roller wheel coupled to the inboard roller shaft, an outboard roller shaft, and an outboard roller wheel coupled to the outboard roller shaft. Additionally, the roller wheel assembly includes a pivot mechanism coupling the inboard roller shaft to the outboard roller shaft.

A track system comprising a dynamic tensioning device located between an idler wheel and the support frame as to apply proper tension in the track. The dynamic tensioning device is adapted to block at its current length upon the occurrence of a determined condition. The dynamic tensioner is adapted to substantially maintain its length when an acceleration and or deceleration of the track system reaches a predetermined value. For instance, such characteristic is relevant in an event of emergency braking. A dynamic tensioner would become contracted and the tension in the endless track would become too low. A low tension could cause the endless track to ratchet.

A method for reducing torsional shock of a driving system of an electric vehicle is provided. In the method, torsional torque of a part of the driving system is calculated by applying motor torque to a motor under the condition that a parking gear is engaged and monitoring a motor speed. Reverse torsional torque having the same magnitude as the calculated torsional torque is applied to the part of the driving system when release of the parking gear is requested, and then the parking gear is released to reduce shock caused by torsion of the part of the driving system when the parking gear is released.

A method for reducing torsional shock of a driving system of an electric vehicle is provided. In the method, torsional torque of a part of the driving system is calculated by applying motor torque to a motor under the condition that a parking gear is engaged and monitoring a motor speed. Reverse torsional torque having the same magnitude as the calculated torsional torque is applied to the part of the driving system when release of the parking gear is requested, and then the parking gear is released to reduce shock caused by torsion of the part of the driving system when the parking gear is released.