Patent ID: 6533700
Filing Date: 2003-03-18
Classification: B62M,Y10T

Abstract:
A hub transmission comprising:a hub axle; a driver rotatably supported to the hub axle; a hub shell rotatably supported to the hub axle; a power transmitting mechanism disposed between the driver and the hub shell for communicating rotational power from the driver to the hub shell through a plurality of power transmission paths including a low speed transmission path having a low speed gear ratio, a high speed transmission path having a high speed gear ratio, and a plurality of intermediate speed transmission paths; a clutch for selecting the plurality of power transmission paths such that, when the clutch changes the power transmitting mechanism from a first intermediate speed transmission path having a first intermediate gear ratio to a second intermediate speed transmission path having a second intermediate gear ratio lower than the first intermediate gear ratio and adjacent to the first intermediate gear ratio, the clutch switches the power transmitting mechanism from the first intermediate speed transmission path to a third intermediate speed transmission path having a third intermediate gear ratio higher than the first intermediate gear ratio and less than the high speed gear ratio before switching the power transmitting mechanism to the second intermediate speed transmission path.