| 摘要 |
A wheeled vehicle of the row bar-type for propelling a rider on the vehicle in response to upper body exercise of the rider producing a rowing motion on the row bar includes a frame for supporting the weight of the rider, a front wheel mounted at a front portion of the frame, a pair of rear wheels mounted on opposite sides of the frame, and steering bars extending from opposite sides of the front wheel so the rider can steer the vehicle solely with the feet while propelling the vehicle by pulling on the row bar. The lower portion of the row bar is coupled to a drive mechanism which includes a drive chain extending from the lower portion of the row bar to a drive sprocket mounted on the frame behind the row bar. The drive chain extends from the bottom of the row bar around the drive sprocket and then extends in a forward direction where its end is affixed to a tension cable which, in turn, extends in a forward direction and is wrapped around a stationary pulley affixed to the frame. The cable then extends to the rear of the vehicle where it wraps around a travelling pulley and then extends in a forward direction where its end is affixed to a stationary point on the frame, preferably adjacent the stationary pulley. The opposite end of the travelling pulley is affixed to a return spring.
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