A portable, multi-platform friction drive system with a retractable motor drive assembly (12), containing all needed components of an electric friction drive system in a portable handheld case (10), including motor (18), batteries (34), and all associated electronics (36), as well as a mounting system (30) that enables use on popular bike share bicycles (20), personal bicycles, and kick scooters. Its mounting system (30) enables the friction drive system to be easily installed in seconds on many varieties of bicycles or kick scooters, and to be removed just as easily when no longer needed. And by means of its retractable motor assembly (12), the present invention enables the friction drive system to be as compact, clean, and safe as possible so as to be easily carried and stored when not in use.

A portable, multi-platform friction drive system with a retractable motor drive assembly (12), containing all needed components of an electric friction drive system in a portable handheld case (10), including motor (18), batteries (34), and all associated electronics (36), as well as a mounting system (30) that enables use on popular bike share bicycles (20), personal bicycles, and kick scooters. Its mounting system (30) enables the friction drive system to be easily installed in seconds on many varieties of bicycles or kick scooters, and to be removed just as easily when no longer needed. And by means of its retractable motor assembly (12), the present invention enables the friction drive system to be as compact, clean, and safe as possible so as to be easily carried and stored when not in use.

A rotary device assembly is provided and includes an input shaft coupled to a torque generating device, an output shaft and a rotary device disposed to transmit first torque from the input shaft to the output shaft and configured with no-back capability to prevent second torque applied to the output shaft from being transmitted to the input shaft in an event the second torque deceeds a torque-limiting threshold and the no-back capability and torsional lock-up capability to prevent an overload of the torque generating device in an event the second torque exceeds the torque-limiting threshold.

A rotary device assembly is provided and includes an input shaft coupled to a torque generating device, an output shaft and a rotary device disposed to transmit first torque from the input shaft to the output shaft and configured with no-back capability to prevent second torque applied to the output shaft from being transmitted to the input shaft in an event the second torque deceeds a torque-limiting threshold and the no-back capability and torsional lock-up capability to prevent an overload of the torque generating device in an event the second torque exceeds the torque-limiting threshold.

Disclosed herein is a rotation transmitting device which permits the transmission of rotation with a reduced play and which permits the constituents to be aligned easily. The rotation transmitting device has a transmitting member (30) which surrounds a rotating part (12) of a drive shaft (11) and a rotating part (22) of a driven shaft (21). At least either the rotating part (12) of the drive shaft (11) or the rotating part (22) of the driven shaft (21) has an external surface that comes into contact with the internal surface of the transmitting member (30) so that friction arising between the internal surface and the external surface achieves torque transmission and reception to and from the transmitting member (30).

Disclosed herein is a rotation transmitting device which permits the transmission of rotation with a reduced play and which permits the constituents to be aligned easily. The rotation transmitting device has a transmitting member (30) which surrounds a rotating part (12) of a drive shaft (11) and a rotating part (22) of a driven shaft (21). At least either the rotating part (12) of the drive shaft (11) or the rotating part (22) of the driven shaft (21) has an external surface that comes into contact with the internal surface of the transmitting member (30) so that friction arising between the internal surface and the external surface achieves torque transmission and reception to and from the transmitting member (30).

An auxiliary machine-driving device has a first idler roller disposed between an engine roller and a first rotating roller; a second idler roller disposed between the first rotating roller and a second rotating roller; a third idler roller disposed between the second rotating roller and the engine roller; and a linking mechanism driven by one actuator to switch the first idler roller between a state in which the first idler roller contacts the engine roller and the first rotating roller, and a state in which the first idler roller separates from the engine roller and the first rotating roller, and to switch at least one of the second and third idler rollers between a state in which the at least one roller contacts two rollers adjacent the at least one roller, and a state in which the at least one roller separates from the two rollers.

An auxiliary machine-driving device has a first idler roller disposed between an engine roller and a first rotating roller; a second idler roller disposed between the first rotating roller and a second rotating roller; a third idler roller disposed between the second rotating roller and the engine roller; and a linking mechanism driven by one actuator to switch the first idler roller between a state in which the first idler roller contacts the engine roller and the first rotating roller, and a state in which the first idler roller separates from the engine roller and the first rotating roller, and to switch at least one of the second and third idler rollers between a state in which the at least one roller contacts two rollers adjacent the at least one roller, and a state in which the at least one roller separates from the two rollers.

The present disclosure relates to a mechanical converter of irregular bi-directional circular motion into continuous and consistent single direction circular motion through a system of gears, drive shafts, freewheels, and flywheel. The system works by transforming the circular movement, both clockwise and counterclockwise from the input shaft into continuous rotation of an output shaft through the use of a pair of free wheels solidly connected to the input shaft which transfers the alternating motion, depending on the rotation of the input shaft, to two parallel secondary shafts.

The present disclosure relates to a mechanical converter of irregular bi-directional circular motion into continuous and consistent single direction circular motion through a system of gears, drive shafts, freewheels, and flywheel. The system works by transforming the circular movement, both clockwise and counterclockwise from the input shaft into continuous rotation of an output shaft through the use of a pair of free wheels solidly connected to the input shaft which transfers the alternating motion, depending on the rotation of the input shaft, to two parallel secondary shafts.