| 摘要 |
A wheelchair has a seat portion and a pair of stationary mounting plates fixed to two sides of the seat portion. Each of the mounting plates has a driven pulley rotatably mounted thereon and a driving unit with a driving pulley. An endless belt interconnects the driving and driven pulleys together. A clutch assembly is mounted on the mounting plate and is associated with the driving unit to engage and disengage the driving unit from a pair of wheels that are attached to the stationary mounting plates.
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