TWO-WHEEL VEHICLE STRUCTURE
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United States of America Patent
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N/A
Issued Date -
Apr 16, 2015
app pub date -
Oct 10, 2014
filing date -
Oct 14, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a two wheel vehicle structure, including: a vehicle frame and a multi-ratio transmission system. The vehicle frame has two wheels and an input tubular member. A crank is attached at each end of the input tubular member. The multi-ratio transmission system includes: a multi-ratio transmission device, a first sprocket, a second sprocket and a chain. The multi-ratio transmission device is installed inside the input tubular member and located at a rotation center of the cranks. The second sprocket is coaxially installed on a wheel axle of a driving wheel. The chain is engaged with the first sprocket and the second sprocket. When the cranks rotate, the first sprocket also rotates in synchronization therewith. The rotational motion generated is transmitted to the multi-ratio transmission device and at the same time transmitted to the second sprocket through the chain, thereby propelling the driving wheel to rotate.
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