| 摘要 |
A drive mechanism and a bicycle having a drive mechanism is disclosed, the drive mechanism increasing the torque resulting from a force applied to the pedals and providing for more efficient transmission of such force to propel the bicycle or other vehicles or device. The drive mechanism includes a drive sprocket rotatably mounted to the bicycle frame, a pair of opposing pedal cranks, a pair of lever arms, each lever arm being rotatably secured to one of the opposing cranks such that there is a distance between the point of connection and the pedal, a pair of guide members, each of which are pivotally connected to the respective lever arms remote from the respective pedals and being pivotally connected to the bicycle frame such that the guide members can limit movement of the respective lever arms, and thereby provide a more efficient path of movement for the pedals. The guide members are connected to the respective lever arms at angles thereto, and the lever arms, at the point of pivotal connection to the guide members, always remain below the axis of the drive wheel.
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