| 摘要 |
An apparatus 10 is provided for connecting a wheel to a bicycle frame 14. In particular, a hub 16 is rotatably connected to the fork portion 12 of the bicycle frame 14. A drawbar 18 acting as an axle passes through a central longitudinal bore in hub 16 and is captured at each end respectively by a cap nut 38 and housing 36. Intermediate the cap nut 38 and fork 12 is a lockdown washer 28. Lockdown washer 28 includes a raised portion extending within the fork portion 12 whereby rotation therebetween is prevented. A raised knurled portion extends longitudinally from the lockdown washer 28 and mates with a corresponding recessed knurled portion within the cap nut 38. Correspondingly, between the housing 36 and fork portion 12, a second lockdown washer 26 is disposed. The lockdown washer 26 also includes a raised portion 30 extending into the frame 12 whereby rotation is prevented therebetween. A raised knurled surface extends longitudinally from the lockdown washer 26 and mates with a corresponding recessed knurled surface in the housing 36. A cam 40 operates to displace the drawbar 18 between first and second preselected longitudinal locations whereby the cap nut 38 and lockdown washer 28, as well as the housing 36 and lockdown washer 26 are compressed against the forks 12 and capture the apparatus 10 against the forks 12.
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