| 摘要 |
<p>The present invention refers to a hub for bicycle wheels comprising a freewheel body (102; 202) adapted to be coupled to a central body (3; 203) by means of a coupling device comprising at least one coupling element (105; 205) associated to the freewheel body (102; 202) and engageable with a respective tooth (110; 210) of a crown gear (107; 207) integral with said central body (3; 203); thrust means (106; 206) are provided to maintain the coupling element (105; 205) engaged with said tooth (110; 210). The thrust means (106; 206) consist essentially of a pair of permanent magnets (111, 112; 211; 212) associated, respectively, with the coupling element (105, 205) and the freewheel body (102; 202) and arranged with their like polarities facing each other.</p> |
