Hub with mechanism to permit backwards movement without pedal movement

摘要

A control mechanism for decoupling a drive ratchet on a bicycle hub makes it possible to push the bicycle backwards while the foot pedals of the pedal crank drive remain still. These functions can be applied to folding bicycles, in which pedal movements are harmful when in their folded up state. The control mechanism includes a controlling sleeve coupled to the drive ratchet, which is indirectly connected by means of a frictional device to the unmoving hub axle.

主权项

1. A bicycle drive hub for crank operated vehicles wherein the drive hub comprises:
a hub axle; a hub shell rotatably mounted about the hub axle; a driver mounted about the hub axle; a freewheel in a torque path in the drive hub between the driver and the hub shell, wherein backwards rotational movement of the hub shell relative to the crank operated vehicle causes the freewheel to become disengaged, so that no torque is transferred to the torque path; and a control mechanism including a control sleeve engaged with a friction spring, whereby in all the operating states of the drive hub, a forwards rotation of the driver causes the control sleeve to permit engagement of the freewheel in the torque path.