Vehicles are disclosed which have a lower center of gravity than existing all-terrain, amphibious, and unmanned ground vehicles due to the location of propulsion units and other vehicle components inside the wheels of the vehicle. The vehicles can climb over large obstacles yet are also able to corner at high speeds. The vehicles can be configured for direct manual operation or operation by remote control, and can also be configured for a wide variety of missions.

The invention relates to an electric wheel hub comprising a driving wheel shell, a driven wheel shell connected to the driving wheel shell, a hub axle penetrating the driving wheel shell and the driven wheel shell, a housing space formed by the inner walls of the driving wheel shell and the driven wheel shell, a drive component arranged in the housing space, and a heat dissipation mechanism for dissipating heat from the housing space, the drive component comprising a drive motor arranged on one side of the hub axle and a transmission component arranged in the housing space, the drive motor driving the driving wheel shell to rotate about the hub axle via the transmission component. The present invention realizes the electric rotation of the wheel hub by driving the wheel hub on the wheel hub axle through the transmission component by the internal driving motor.

A rear wheel of a bicycle comprising a tire rim with spokes, a hub axle on which at least one chain drive wheel is rotatably mounted, and a one-way clutch assembly. The one-way clutch assembly consists of coaxially arranged: the rim with internal teeth and the disc with at least one hook for engaging the internal tooth, fixed around the circumference of the disc. The rim has an internal radius defining the circle on which the tips of the internal teeth lie, and this radius is greater than the radius of the circle on the disc on which there is a fixation of at least one hook. One of the elements of the one-way clutch assembly: the rim or the disc, is integrated with the chain drive wheel, and the spokes are fixed to the other element of the one-way clutch assembly: the disc or the rim, respectively.

A hub-bearing unit having an axis of rotation includes a radially outer ring configured to be stationary, a flanged hub inside the radially outer ring configured to rotate relative to the axis and relative to the radially outer ring, a radially inner ring mounted on the flanged hub in axial abutment with a shoulder of the flanged hub, a front toothing configured to receive a driving torque from a joint, and a retainer configured to receive and form a snap fit seal with an elastic ring connected to the joint, the retainer being located on a radially external cylindrical surface of the radially inner ring and comprising a shaped metal insert and an elastomeric element vulcanized onto the metal insert.

A bicycle component for a bicycle freewheel unit, wherein the freewheel unit includes a rotary unit and a toothed disk device coupled with the rotary unit. The toothed disk device includes an end toothing with axial engagement components for engaging corresponding engagement components of another toothed disk device. The toothed disk device and the rotary unit are each configured as coupling components coupled to one another, and include a radial toothing each, for engaging with one another, and which are commonly rotatable. The rotary unit and the toothed disk device are movable in a peripheral direction relative to one another between a driving position and a rest position, so that prior to torque transmission starting, a coupling component is rotated in the driving direction about a clearance angle of at least 5, until torque can be transmitted, when the two radial toothings have previously been in the rest position.

A wheel bearing assembly includes a wheel hub having inner teeth, a wheel bearing arranged at the wheel hub, and a constant velocity joint having an axle journal with outer teeth engaged with the inner teeth for torque transmission. A clamping device axially clamps the wheel hub and the wheel bearing against the constant velocity joint so that a bearing inner ring bears against a contact shoulder of the constant velocity joint. A metallic, uncoated friction ring is positioned between the bearing inner ring and the contact shoulder. The friction ring provides a coefficient of sliding friction that is at least 80 percent of a coefficient of static friction for both the bearing inner ringtofriction ring interface and the friction ringtocontact shoulder interface.