| 摘要 |
A freewheel assembly (1) for a rear wheel of a bicycle includes a body (10), a sprocket wheel (12) mounted on the body (10), a sleeve (16) sandwiched between the body (10) and the sprocket wheel (12), a plurality of roller bearings (11) fitted between the sleeve (16) and the sprocket wheel (12), a disk clamp (15) fitted to a distal end of the body (10) and clamping the sprocket wheel (12) to the body (10), and pluralities of first and second ball bearings (13, 14) to ensure correct location of the sprocket wheel (12) and roller bearings (11). In a driving mode of the freewheel assembly (1), the roller bearings (11) engage the sprocket wheel (12) to the body (10). In a non-driving mode, the roller bearings (11) separate from sprocket wheel (12) to allow the body (10) to rotate while the sprocket wheel (12) does not rotate.
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