An omni-directional rotational drive mechanism and a moving body in which production and maintenance can be facilitated, while the size can be reduced, by making the number of components smaller. A rotating body provided for a wheel member rotatable about a ring-shaped shaft having a rotating shaft of the wheel member as its center. The rotating body is configured to rotate integrally with the wheel member about the rotating shaft. A pair of worms rotatable about the same shaft as the rotating shaft of the wheel member. A pair of worm wheels are provided for the wheel member so as to be rotatable by meshing with different worms, and capable of transmitting each of rotations to the rotating body. The rotating body is configured so as to rotate or stop with respect to the wheel member in accordance with the rotational direction and the rotational speed of the respective worms.

A clamping mechanism is provided, the clamping mechanism have two clamps, a tensioning conduit corresponding to each of the clamps, and an actuator for simultaneously tensioning the two clamps by way of the tensioning conduits. Each clamp has a bracing element and a gripping segment, and when the clamps are tensioned along the tensioning conduit, the gripping segment of each clamp is drawn towards the corresponding bracing element. Also provided is a bicycle drive assembly, the assembly has two clamps for fixing to a bicycle, a drive mechanism for driving a bicycle wheel, and two elongate supports extending from the drive mechanism to corresponding clamps. When applied to a bicycle, a wheel of the bicycle passes partially between the elongate supports.

A snow vehicle is disclosed comprising a vehicle frame, a propulsion unit coupled to the frame, and at least one front ski steered by a steering mechanism. The front of the vehicle includes a first front suspension and a second front suspension coupled to the ski. The rear suspension includes a bumper assembly preventing bottoming out of the rear suspension. The rear suspension is coupled to the vehicle frame such that the longitudinal spacing between the vehicle frame and rear suspension is adjustably controllable.

A method, system, apparatus, and/or device for propelling a non-motorized vehicle forward. The method, system, apparatus, and/or device may include a frame, a first wheel, a second wheel, a motor, a controller, and a bracket. The frame may attach to the first wheel, the second wheel, and the motor. The first wheel may attach to a first side of the frame and rotate about an axis. The second wheel may attach to a second side of the frame and rotate about the axis. The motor may connect to the first wheel, where the motor is configured to rotate the first wheel to propel the apparatus forward. The controller may control a speed at which the motor rotates the first wheel. The bracket may attach to a front of the first frame and connect to a non-motorized vehicle.

An electric vehicle has a structure mounted on balls which are arranged for rolling on the ground, wherein an actuating roller is associated with each ball. The roller-supporting structure is rotatably mounted about a substantially vertical axis within a main supporting structure which is rigidly connected to the ball-supporting member. The main support structure carries a first electric motor for controlling the rotation of the roller-supporting structure about the substantially vertical axis, while the roller-supporting structure carries a second electric motor for controlling the rotation of the roller about its axis.

A propulsion device for a two-wheeled vehicle includes a mechanism for providing traction to a rear wheel for manual advancement of the vehicle and a first epicyclic gear reducer coupled with the mechanism and drivable by a first control device configured for varying the geometric configuration of the first epicyclic gear reducer and thus the gear ratio. A motor for assisting pedalling is interposed between the mechanism for the bottom bracket and the rear wheel and is coupled with a second epicyclic gear reducer, drivable by a second control device configured for varying the geometric configuration of the second epicyclic gear reducer and thus the corresponding gear ratio. The second epicyclic gear reducer is coupled and directly in contact with the rear wheel in order to transmit the movement from the propulsion device thereto.

A propulsion device for a two-wheeled vehicle includes a mechanism for providing traction to a rear wheel for manual advancement of the vehicle and a first epicyclic gear reducer coupled with the mechanism and drivable by a first control device configured for varying the geometric configuration of the first epicyclic gear reducer and thus the gear ratio. A motor for assisting pedalling is interposed between the mechanism for the bottom bracket and the rear wheel and is coupled with a second epicyclic gear reducer, drivable by a second control device configured for varying the geometric configuration of the second epicyclic gear reducer and thus the corresponding gear ratio. The second epicyclic gear reducer is coupled and directly in contact with the rear wheel in order to transmit the movement from the propulsion device thereto.

A wheel having rim support structure that affords access to a load connection structure within the wheel. The load connection structure may be configured for movement in response of a force. A rotatable mount bracket is provided on the rim support structure and guides movement of the load connection structure. Various embodiments are disclosed including internal drive and non-internal drive, roller and gear based driving, access on one or both sides of the wheel device, and other features and embodiments.

Drive disks are configured to rotate a main wheel by applying a frictional force thereto. Each of the drive disks includes a base and a plurality of rollers. The base includes a first sheet metal member and a second sheet metal member. The first sheet metal member includes a first central part and a plurality of first arm parts. The second sheet metal member includes a second central part and a plurality of second arm parts. Each of the rollers has a first end and a second end in an axial direction thereof. Each of the first arm parts and each of the second arm parts support the first end of one of two rollers adjacent to each other and the second end of the other of the two rollers adjacent to each other.

Drive disks are configured to rotate a main wheel by applying a frictional force thereto. Each of the drive disks includes a base and a plurality of rollers. The base includes a first sheet metal member and a second sheet metal member. The first sheet metal member includes a first central part and a plurality of first arm parts. The second sheet metal member includes a second central part and a plurality of second arm parts. Each of the rollers has a first end and a second end in an axial direction thereof. Each of the first arm parts and each of the second arm parts support the first end of one of two rollers adjacent to each other and the second end of the other of the two rollers adjacent to each other.