A wheel hub transmission unit for a wheel hub defining an axis of rotation includes a pinion hub carrier arranged concentrically with respect to the axis of rotation and onto which a pinion is mounted torsionally rigid to drive the wheel hub, a hub body arranged axially next to the pinion hub carrier and having an interior space, a transmission sleeve arranged concentrically inside the interior space and including a magnetically coded material that forms a measuring portion, a drive coupling via which the pinion hub carrier and the transmission sleeve are coupled, and an output coupling via which the transmission sleeve is coupled to the hub body such that the torque is detectable in the interior space by the measuring portion of the transmission sleeve by the magnetic properties of the magnetically coded material, wherein the magnetic properties change under the influence of the torque.

A bicycle having a rear wheel including an axle, a hub shell, a torque element including a torque output portion and a torque input portion, and a rear cog coupled to the torque input portion. The torque output portion is a first radial distance from the torque input portion. The position sensor measures a rotational position of the torque input portion relative to the torque output portion. In one embodiment, the position sensor includes a displacement indicator (e.g., a radial tab mounted to the torque output portion) and a displacement sensor (e.g., an inductive sensor mounted to the torque input portion). The inductive sensor preferably has two sensing coils positioned on each side of the displacement indicator. The hub assembly can further comprise a wireless transmitter adapted to transmit data from the position sensor. The hub shell preferably includes a window that facilitates data transmission from the wireless transmitter.

A bicycle having a rear wheel including an axle, a hub shell, a torque element including a torque output portion and a torque input portion, and a rear cog coupled to the torque input portion. The torque output portion is a first radial distance from the torque input portion. The position sensor measures a rotational position of the torque input portion relative to the torque output portion. In one embodiment, the position sensor includes a displacement indicator (e.g., a radial tab mounted to the torque output portion) and a displacement sensor (e.g., an inductive sensor mounted to the torque input portion). The inductive sensor preferably has two sensing coils positioned on each side of the displacement indicator. The hub assembly can further comprise a wireless transmitter adapted to transmit data from the position sensor. The hub shell preferably includes a window that facilitates data transmission from the wireless transmitter.

A wheel hub bearing unit includes an outer ring disposed on an axially outer side of the hub bearing unit and coupled to a wheel, a stationary shaft passing through a center bore of the outer ring, and a plurality of rolling elements arranged in an annular space between the outer ring and the stationary shaft. Motor and speed reduction units are offset from an axis of the wheel hub bearing unit in a direction perpendicular thereto, with the motor unit disposed adjacent to an axially inner end portion of the stationary shaft. The speed reduction unit includes an output gear coupled to the outer ring and a rolling bearing provided between the output gear and the stationary shaft to support the output gear. A carrier disposed on an axially inner side relative to the hub bearing unit is secured to the axially inner end portion of the stationary shaft.

A wheel hub bearing unit includes an outer ring disposed on an axially outer side of the hub bearing unit and coupled to a wheel, a stationary shaft passing through a center bore of the outer ring, and a plurality of rolling elements arranged in an annular space between the outer ring and the stationary shaft. Motor and speed reduction units are offset from an axis of the wheel hub bearing unit in a direction perpendicular thereto, with the motor unit disposed adjacent to an axially inner end portion of the stationary shaft. The speed reduction unit includes an output gear coupled to the outer ring and a rolling bearing provided between the output gear and the stationary shaft to support the output gear. A carrier disposed on an axially inner side relative to the hub bearing unit is secured to the axially inner end portion of the stationary shaft.

A bicycle rear sprocket assembly comprises a first sprocket, a second sprocket, and a sprocket support. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth. The first sprocket body has at least one first recess. The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. The sprocket support is configured to engage with a bicycle hub assembly. The sprocket support includes a sprocket attachment part. The first sprocket and the second sprocket are attached to the sprocket attachment part. The sprocket attachment part is at least partly provided in the at least one first recess to transmit a rotational force between the first sprocket and the sprocket support.

A bicycle rear sprocket assembly comprises a first sprocket, a second sprocket, and a sprocket support. The first sprocket includes a first sprocket body and a plurality of first sprocket teeth. The first sprocket body has at least one first recess. The second sprocket includes a second sprocket body and a plurality of second sprocket teeth. The sprocket support is configured to engage with a bicycle hub assembly. The sprocket support includes a sprocket attachment part. The first sprocket and the second sprocket are attached to the sprocket attachment part. The sprocket attachment part is at least partly provided in the at least one first recess to transmit a rotational force between the first sprocket and the sprocket support.

This invention discloses a novel product of a Wheel Hub Assembly for damping and noise reduction. It absorbs vibration and noise of brake rotor and brake drum in the braking process by changing flange face structure as well as adding damping coating. During the production, the flange face of the Wheel Hub Assembly is equipped with one or several technical groove(s) while a damping coating is designed to reduce vibration and noise. The damping coating is made of rubber materials, composite materials, damping coating materials or high polymer materials. In this invention, the damping coating is added between wheel hub and brake disk or brake drum. This can not only absorb a part of noise, but also reduce braking vibration to decrease the noise.

Provided is an intelligent electric wheel hub which belongs to the field of bicycle parts. Two ends of a cylindrical wheel hub housing (2) of the electric wheel hub are respectively connected to a wheel hub left end cover (25) and an outer flywheel ring (7) of a flywheel mechanism to form an inner cavity for integrating and accommodating a gear motor, a battery pack and a controller panel. The intelligent electric wheel hub is highly integrated and is energy-saving and environmentally friendly.

A bicycle hub has a hub member and a chain seat. The hub member has an open containing space and a central axis protruding from the containing space. The containing space has a linking ring around the central axis, and the linking ring further has an annular linking toothed portion. An end of the chain seat has an engaging portion with a circular stopper and a circular rib and a driving ring and a first engaging toothed ring. A second engaging toothed ring is installed onto the driving ring and engaging with the first engaging toothed ring, and a driving toothed portion is formed on an outer periphery of the driving ring. A spring is disposed between the top stopping portion and the driving ring, and two ends of the spring are respectively jacketed on to the engaging protrusion and the inserting protrusion.