| 摘要 |
A free coaster bicycle wheel driving apparatus having a clutch that employs radially acting components. A drive sleeve has an inner cylindrical wall surface mounted coaxially about a wheel mounting shaft and an outer cylindrical wall surface that is eccentric relative to the drive sleeve inner wall surface. The outer surface of the drive sleeve cooperates with a power transmission sleeve that has an inner cylindrical wall surface that is eccentric relative to its cylindrical outer wall surface. The power transmission sleeve is interposed between the drive sleeve and a wheel hub. When the eccentric lobe on the drive sleeve is in opposition to the eccentric lobe on the surrounding power transmission sleeve, the sprocket is disengaged from the wheel hub. Forward rotation of the sprocket jams the lobe of the drive sleeve against the power transmission sleeve, forcing its cam lobe outwardly into frictional engagement with the wheel hub.
|
