| 摘要 |
<p>A bicycle wheelhub dynamo for mounting in the hub of a running wheel of a bicycle has two hub flanges for securing rim holding spokes and is rotatably mounted on an axis of the running wheel. A magnet associated to a coil can be rotated by a planetary gear (21) and induce current in the coil. The coil is connected to a current collecting contact. The magnet is designed as a magnetic rotor (15) and rotatably engages on the axis (3) of the hub body the planetary gear (21), by means of a pinion (14) formed on the magnetic rotor (15). The magnetic rotor (15) is surrounded by a coil arrangement (16) or is adjacent thereto. The coil arrangement (16) is formed on a hollow cylinder (6) rigidly secured to the hub body (1). The hollow cylinder (6) is linked by one end section (22) to an annular flange axially movable on the axis (3) by means of a spring (7), and by the other end section to a movable clutch arranged on the axis (3) which is linked to the planetary gear (21) and can operationally engage a clutch disk (10) linked to the hub body (1).</p> |
