Abstract: The present disclosure relates to transmission systems for vehicles and especially those for use in electric bicycles, where human power is augmented with electric motor derived power. The present disclosure includes various embodiments, where the electric motor is of the harmonic drive type and wherein there is provided a secondary axle or bracket which provides the output of the systems, driven by both the manual input and the motor input, and wherein these two inputs are insulated from one another by placement of one-way clutches, between the flex-spline and the secondary axle or bracket and between the bracket and the primary drive axle. A modular assembly for such transmission systems and a method of assembly and disassembly are also disclosed.

Abstract: A one-way bearing, a bearing assembly, and a free-wheeling mechanism for a bicycle are disclosed herewith. The bearing assembly, in one aspect, includes a one-directional bearing having an inner and an outer race, the one-directional bearing including a sprag clutch mechanism. The bearing assembly, according to this aspect, further includes a first thrust bearing and a second thrust bearing, wherein the inner and outer races of the one-directional bearing are formed to retain one or both of the first or second thrust bearings, and a one-directional bearing mechanism located between the inner and outer races. In at least one aspect, the inner race has a flange extending in a radially outward direction, the sprag clutch mechanism abuts the flange on an inner axial side of the flange, and the flange abuts the first thrust bearing on an outer axial side of the flange.

Abstract: A gearing system comprises a first rotational input, a second rotational input and a rotational output. The first rotational input and second rotational input may transmit a rotation to the rotational output, wherein one of the first rotational input and second rotational input is connected to the rotational output through a one way clutch, and wherein the other of the first rotational input and second rotational input is connected to the rotational output through an overrunning clutch, wherein said one way clutch and said overrunning clutch are rotationally coupled. The gearing system may be used in electric bicycles, but may also be used in other dual propulsion vehicles such as hybrid cars.