The presently disclosed invention provides an outer rotor brushless direct current motor that includes a tire integrated as part of the outer rotor, and is thus configured as a direct drive wheel, such as may be used on a mobile robot. The drive wheel includes a cylindrical outer rotor having a plurality of poles positioned on an inner surface, a stationary stator spaced inwardly from the rotor and defining a magnetic clearance gap between the plurality of poles of the rotor and a plurality of electromagnets positioned on an outer circumference of the stator, and a stationary central shaft. The stator is mounted to the central shaft and the rotor is configured for rotation about the stator.

The vehicle power device includes: a wheel bearing; and an electric motor including a stator and a rotor. The vehicle power device includes a rotor casing that is a cover member covering the electric motor and a part of the wheel bearing, the part being located on an inboard side with respect to the hub flange, such that a separated space is defined inside the cover member. A seal member configured to prevent entry of moisture from a press-fitting part where a hub bolt is press-fitted into a bolt hole provided in the hub flange is disposed near the press-fitting part. The hub flange is formed with an annular groove coaxial with the hub bolt in an area where a head of the hub bolt comes into contact with an inboard-side surface of the hub flange, and the seal member having a ring shape is disposed in the annular groove.

A wheel bearing for a motor vehicle is provided with an outer ring, an inner ring arranged at least partially inside the outer ring, and with a longitudinal axis extending in the axial direction of the outer ring and of the inner ring from a vehicle inner side to a vehicle outer side. The inner ring is provided with a flange section on its end facing the vehicle inner side having a first section at the point that is farthest from axial center of the outer ring, and with a second section which forms a contact surface for attaching a brake disk. The flange section is formed stepped in such a way, so that the contact surface for attaching the brake disk is arranged offset relative to the section of the flange section at the farthest point from the axial center of the outer ring in the axial direction toward the vehicle inner side, and so that an at least a partially circumferential projection is located on the side opposite the contact surface for attaching the brake disk.

Disclosed are an in-wheel working device and an automobile including the in-wheel working device. According to one aspect of the present disclosure, provided is an in-wheel working device including a rotation detection sensor coupled to a wheel bearing. The rotation detection sensor includes: a sensor stator coupled to an outer race of the wheel bearing; and a sensor rotor coupled to a hub of the wheel bearing. The sensor stator includes a printed circuit board (PCB) substrate having a surface on which a coil pattern made of a metal material is formed.

Systems and methods for an energy harvester coupled to a rotatable component of a vehicle are disclosed. In some embodiments, an energy harvester system includes at least one energy harvesting component configured to be attached to a wheel of a vehicle, wherein the at least one energy harvesting component includes a piezoelectric component configured to be directly attached to a staging surface of the wheel, wherein the piezoelectric component is configured to deform in response to a mechanical strain imparted on the piezoelectric component as the wheel rotates and generate an electric signal.

A rear wheel axle for a bicycle includes a hollow wheel axle and an axle shaft inserted therethrough and torque support elements for supporting torque exerted on the wheel axle on drop outs of a bicycle frame. The torque support elements are formed by a first part of an outside of the axle shaft and a part of an inside of the wheel axle, which parts jointly form a first form locked connection, and are also formed by a second part of the outside of the axle shaft, which together with a bounding wall of a through hole provided in an inserted piece which is fixed in the direction of rotation relative to one of the drop outs, forms a second form locked connection. The first and second parts of the outside of the axle shaft are fixed relative to each other in the direction of rotation of the axle shaft.

The bicycle wheel includes a rim, a hub, a driving device, a plurality of first side pulling spokes, a plurality of first side pushing spokes, and a plurality of second side spokes. The rim has a first side and a second side. The hub is located in a center of the rim. The driving device is connected to the hub which is located on the first side of the rim. Each of the first side pulling spokes and the first side pushing spokes is connected to the rim and the hub, and located on the first side of the rim, respectively. Each of the second side spokes is connected to the rim and the hub, and located on the second side of the rim.

A hub for bicycles including a hub shell which is rotatably supported relative to a hub axle, a rotor rotatably supported relative to the hub axle by means of two rotor bearings, and a freewheel device having two interacting freewheel components namely, a hub-side freewheel component and a rotor-side freewheel component. The two freewheel components each include axial engagement elements and they are movable relative to one another in the axial direction between a freewheel position and an intermeshing engaging position. Rolling members are provided for defined accommodation in the hub-side freewheel component to support the hub shell relative to the hub axle. An attachment portion and a centering portion are configured in the hub shell and an attachment area and a centering area are configured on the hub-side freewheel component. The attachment area is connected with the attachment portion and the centering area is centered on the centering portion.

The present invention relates to a hub for a bicycle, having a hub axle, a hub sleeve which is mounted rotatably on the hub axle via a bearing arrangement, a driver which is mounted rotatably on the hub axle via a bearing arrangement and is coupleable to the at least one hub sleeve in a torque-transmitting manner, wherein the bearing arrangement has at least one axially inner bearing and at least one axially outer bearing. At least one fastening element is provided, which fixes at least the inner bearing of the bearing arrangement in its predetermined position on the hub axle by a local or sectional enlargement of the cross section of the hub axle.

In a propulsion device including a main wheel having a plurality of driven rollers fitted on and arranged circumferentially along an annular core member so as to be rotatable around tangential lines of the annular core member at respective positions thereof on the annular core member, a pair of drive disks positioned on either side of the main wheel in an individually rotatable manner, a plurality of drive rollers supported along an outer periphery of each drive disk so as to be each rotatable around a rotational center line extending in a skewed relationship to a rotational center line of the corresponding drive disk, and a drive unit for individually rotatively driving the drive disks, a plurality of guide rollers are rotatably supported by a body frame and engage at least one driven roller not engaged by any of the drive rollers from either side.