A carriage assembly includes a primary frame, a first idler wheel mounted to the primary frame, and a secondary frame pivotably mounted to the primary frame. The carriage assembly further includes an idler wheel assembly coupled to the secondary frame and movable with respect to the secondary frame along a longitudinal axis of the idler wheel assembly. The idler wheel assembly includes at least one second idler wheel and at least one third idler wheel mounted to the idler wheel assembly such that the second idler wheel is located between the first idler wheel and the third idler wheel. The first idler wheel is configured to pivot with the primary frame relative to the secondary frame, and the second idler wheel and the third idler wheel are configured to move with the idler wheel assembly relative to the secondary frame along the longitudinal axis of the idler wheel assembly.

A track drive for outdoor power equipment has a support frame with a centerline and a hub bearing attached to the support frame. A drive sprocket having a nesting interior half and exterior half is attached to the hub bearing, which enables the drive sprocket to rotate relative to the support frame. The drive sprocket is attached to an associated drive hub of a piece of outdoor power equipment. Drive sprocket teeth are spaced radially about the drive sprocket, with a first set of drive teeth attached to the interior half sprocket and located on an interior side of the support frame. A second set of drive teeth are attached to the exterior half sprocket and located on an exterior side of the support frame. The drive sprocket transmits a rotational force to an endless track to rotate the endless track and propel the outdoor power equipment.

A track system for traction of a vehicle comprising a track to engage the ground and comprising elastomeric material, a ground-engaging outer side and an inner side opposite to the ground-engaging outer side. The track system also comprises a track-engaging arrangement for driving and guiding the track around the track-engaging arrangement, which comprises: a drive wheel for movement of the track; a leading idler wheel and a trailing idler wheel spaced apart in a longitudinal direction of the track system, and a plurality of roller wheels between the idler wheels. The track system also comprises a frame supporting the idler and roller wheels. The track system also comprises a plurality of mounts spaced apart in the longitudinal direction of the track system to interconnect the frame of the track system to the vehicle frame, and allow movement of the frame of the track system relative to the vehicle frame.

A suspended undercarriage assembly connectable to a track system including a frame member has a resilient assembly. The resilient assembly includes a first arm connected to the frame member, a second arm pivotally connected to the first arm, a spacing defined between the first and second arms, and a resilient member disposed in the spacing and connected to the first and second arms. The resilient member is resiliently deformable to permit movement of the second arm relative to the first arm, and to resiliently bias the second arm towards a rest position with respect to the first arm. The suspended undercarriage assembly provides suspension to a support wheel assembly relative to the frame member when connected to the second arm.

A suspended undercarriage assembly connectable to a track system including a frame member has a resilient assembly. The resilient assembly includes a first arm connected to the frame member, a second arm pivotally connected to the first arm, a spacing defined between the first and second arms, and a resilient member disposed in the spacing and connected to the first and second arms. The resilient member is resiliently deformable to permit movement of the second arm relative to the first arm, and to resiliently bias the second arm towards a rest position with respect to the first arm. The suspended undercarriage assembly provides suspension to a support wheel assembly relative to the frame member when connected to the second arm.

A track assembly includes an elongated main frame supported for pivotal movement on a transverse axis and having opposite end portions supporting a set of end wheels. An endless flexible belt extends around the end wheels and has an upper run and a lower run for engaging the ground. A plurality of longitudinally spaced bogie wheels are positioned below the main frame and engage the lower run of the belt. The bogie wheels are carried by bogie frames supported for vertical movement and also for tilting movement relative to a plane defined by the axes of the end wheels. The bogie frames are urged or biased downwardly against the lower run of the belt by compression members extending from the main frame and preferably in the form of annular rubber spring members.

A rugged and compact articulated wheel with at least two hubs, and wheeled vehicles that include one or more of such articulated wheels.

A steering system of a vehicle is provided. The steering system adjusts the torsional rigidity of a torsion bar without limitation as to the configuration thereof and performs active control responding to the vehicle state by adjusting steering characteristics by controlling the torsional rigidity of the torsion bar based on the traveling condition, load state or driving mode of the vehicle. The steering system includes an MR assist device, which is coupled to an end portion of the torsion bar and adjusts the rotation and torsional rigidity of the torsion bar using an MR fluid as a working fluid.

A deformable wheel is disclosed. The deformable wheel includes a hub, at least one resilient member connected to the hub, and a plurality of circumferentially positioned rim portions connected to the at least one resilient member, where each one of the plurality of rim portions is moveable relative to the hub about the at least one resilient member. A track system including the deformable wheel is also disclosed.

A deformable wheel is disclosed. The deformable wheel includes a hub, at least one resilient member connected to the hub, and a plurality of circumferentially positioned rim portions connected to the at least one resilient member, where each one of the plurality of rim portions is moveable relative to the hub about the at least one resilient member. A track system including the deformable wheel is also disclosed.