A one-way bearing, a bearing assembly, and a free-wheeling mechanism for a bicycle are disclosed herewith. The bearing assembly, comprises a one-directional bearing having an inner and outer race, 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 thrust bearings. The one-way bearing comprises an outer race and an inner race with a one-directional bearing mechanism located between said inner and outer races, the inner race comprising an inner race ring portion, with an inner flange projecting from the inner race ring portion in a first direction parallel to an axis of rotation of the bearing, and an outer flange, projecting in a second direction away from the axis of rotation of the bearing, an outer race comprising an outer race ring portion and an outer flange portion extending axially inwardly from the outer race ring portion, there therefore being defined a first bearing surface around an outer circumference of the inner race ring portion, a second bearing surface defined by the inner circumference of the outer race ring portion, a third bearing surface defined by a first sidewall of the inner race ring portion and/or the inner flange, a fourth bearing surface defined by a second sidewall of the inner race ring portion and/or the outer flange and a fifth bearing surface defined by an inner surface of the outer race flange portion.

A hub with disengaging effect of ratchet faces in an idle mode includes: a gear barrel with first and second housing parts is located at the spacing from the driven end of the hub; a ratchet disc fixed in the driven end has a first annular ratchet face corresponding to the gear barrel; a double-sided free toothed disc disposed in the first housing part is in synchronous rotation with the gear barrel, and includes a second annular ratchet face, which is in a single steering engagement drive relationship with the first annular ratchet face; an elastic expansion member is disposed between the ratchet and double-sided free toothed discs, to push off annular ratchet faces in idle mode; a repulsion disc is mounted in the second housing part at the circumferential direction; an axial repulsion member has repulsion parts which are respectively disposed in the double-sided free toothed and repulsion discs.

A hub with disengaging effect of ratchet faces in an idle mode includes: a gear barrel with first and second housing parts is located at the spacing from the driven end of the hub; a ratchet disc fixed in the driven end has a first annular ratchet face corresponding to the gear barrel; a double-sided free toothed disc disposed in the first housing part is in synchronous rotation with the gear barrel, and includes a second annular ratchet face, which is in a single steering engagement drive relationship with the first annular ratchet face; an elastic expansion member is disposed between the ratchet and double-sided free toothed discs, to push off annular ratchet faces in idle mode; a repulsion disc is mounted in the second housing part at the circumferential direction; an axial repulsion member has repulsion parts which are respectively disposed in the double-sided free toothed and repulsion discs.

A housing for a torque converter comprising: an axis of rotation; a cover including: a first inner surface; a first outer surface opposite the first inner surface; a first axially extending necked portion radially outward relative to the axis of rotation and parallel to the axis of rotation, an impeller shell non-rotatably connected to the cover and having: a second inner surface; a second outer surface opposite the second inner surface; a second axially extending necked portion radially outward relative to the first axially extending necked portion; a line orthogonal to the axis of rotation passes through the first and second axially extending necked portions; and, a weld fixedly securing the first inner surface to the second inner surface at at least one point on the line. A torque converter including such a housing closure is also described.

The present disclosure provides a bicycle hub that provides improved drive line efficiency and bike-to-rider torque feedback. The drive line efficiencies are due to lower rolling resistance resulting from a novel bearing and sprag clutch configuration, a lightweight design, and immediate torque transfer from the cassette drive to the hub body. The bike-to-rider feedback has been improved as the torque transfer is smooth, predictable, and immediate.

The present disclosure provides a bicycle hub that provides improved drive line efficiency and bike-to-rider torque feedback. The drive line efficiencies are due to lower rolling resistance resulting from a novel bearing and sprag clutch configuration, a lightweight design, and immediate torque transfer from the cassette drive to the hub body. The bike-to-rider feedback has been improved as the torque transfer is smooth, predictable, and immediate.

A multi-speed hub gear, comprising: an axle adapted to be fixed against rotation; a hub shell; a plurality of planetary gear sets, each comprising: a central gear concentrically fixed on the axle, a rotating gear carrier mounting at least one rotating gear to revolve around the center of the central gear; and a ring gear rotated by the at least one rotating gear; wherein a respective the ring gear of one of the sets is mechanically connected to a respective the rotating gear carrier of another of the sets such that the sets rotate in conjunction; and a gear shifter adapted to engage at least one of the sets to the hub shell while disengaging another of the sets from the hub shell.

An improved rear pulley for a rear wheel vehicle having a flexible drive belt. The improved rear pulley has a pulley ring that includes pulley teeth for gripping the flexible drive belt, and a pulley ring wall that extends inwardly from the pulley ring. The pulley ring contains sides for maintain the flexible drive belt on the pulley teeth. The improved rear pulley has an outer hub that has an exterior and an interior outer hub surface. The interior outer hub surface has a first, a second and a third interior outer hub face. The exterior outer hub surface has an outer hub wall that extends outwardly. The improved rear pulley has an inner hub that includes an exterior and an interior inner hub surface. The improved rear pulley has bearings and a sprag clutch for allowing rotation and directional rotation, respectively, of the outer hub about the inner hub.

An improved rear pulley for a rear wheel vehicle having a flexible drive belt. The improved rear pulley has a pulley ring that includes pulley teeth for gripping the flexible drive belt, and a pulley ring wall that extends inwardly from the pulley ring. The pulley ring contains sides for maintain the flexible drive belt on the pulley teeth. The improved rear pulley has an outer hub that has an exterior and an interior outer hub surface. The interior outer hub surface has a first, a second and a third interior outer hub face. The exterior outer hub surface has an outer hub wall that extends outwardly. The improved rear pulley has an inner hub that includes an exterior and an interior inner hub surface. The improved rear pulley has bearings and a sprag clutch for allowing rotation and directional rotation, respectively, of the outer hub about the inner hub.

A drive unit includes: a pedal crankshaft to which a pedal stepping force of a rider is applied; an electric motor that detects a torque input to the pedal crankshaft and generates a drive force; and a transmission that changes shift of the drive force of the electric motor and delivers the drive force to the pedal crankshaft, the transmission includes a main shaft that supports a plurality of drive gears and a counter shaft that supports a plurality of driven gears that engage with the plurality of respective drive gears, and the transmission selects one torque delivery gear among the plurality of drive gears, delivers the drive force of the electric motor to the counter shaft, and shifts the torque delivery gear without inverting a rotational direction of the drive gear.