| 摘要 |
A bicycle hub transmission includes a hub axle, a driver rotatably mounted to the hub axle, a slave rotatably mounted to the hub axle, a power transmitting mechanism disposed between the driver and the slave for changing a rotational speed of the driver and for communicating rotational power from the driver to the slave, a clutch mechanism for selectively engaging and disengaging the slave and the driver, and a clutch switching mechanism for controlling the operation of the clutch. The clutch switching mechanism includes an elongated weight member having a first end and a second end, wherein the second end pivots radially outwardly around the first end in response to centrifugal force created by rotation of the weight member around the hub axle. A control member is operatively coupled to the clutch mechanism and is rotatable about the hub axle between an engaging position for causing the clutch to engage the driver and the slave and a disengaging position for disengaging the driver and the slave. An interlocking member is coupled to the weight member in a position spaced apart from the first end of the weight member toward the second end of the weight member and coupled to the control member for rotating the control member in response to radially outward movement of the second end of the weight member. The weight member may be coupled for rotation with the driver or the slave as appropriate for the application. In either case the interlocking member may be formed as a link member having a first end connected to the control member and a second end connected to the weight member at the second end of the weight member to maximize movement of the control member in response to pivoting of the weight member.
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