| 摘要 |
<p>PCT No. PCT/SE84/00117 Sec. 371 Date Dec. 4, 1984 Sec. 102(e) Date Dec. 4, 1984 PCT Filed Apr. 12, 1984 PCT Pub. No. WO84/04076 PCT Pub. Date Oct. 25, 1984.A power supply and transmission system for a bicycle of the type having a frame and a crank housing for a crank-and-pedal and from said crank housing a projecting fork carrying the drive wheel over the drive hub at the other end thereof, and in which the power transmission system comprises a drive shaft which at both ends is connected to angle gears at the crank housing and the drive hub and in which the drive shaft is enclosed in one of the fork tubes, and the power supply is directly connected to the power transmission system at the drive wheel hub. Preferably the crank housing is formed with a several stage gear. The drive wheel hub is formed as a free wheel hub which when pedaling the bicycle forwardly provides a power transmission between the drive shaft and the outer sleeve of the hub. The means for driving and braking the bicycle is a threaded power receiving gear which cooperates with a threaded double conical drive sleeve, which upon movement in one direction connects the power receiving gear to the outer sleeve of the hub, while when moved in the opposite direction connects the outer sleeve of the hub to a stationary mounted brake cone. In a preferred embodiment of the invention the electric power supply and transmission system is mounted in the second one of the two bottom fork tubes, and said electrical transmission system may include a centrifugal clutch for connecting an electric generator at a driving speed exceeding a predetermined value.</p> |
