The present invention relates to a wheelchair with forced driven front
caterpillar wheels with a cable-hauling ratchet lever by which a user, by
himself/herself, can pass over a road-block or drains on roads, lifts up
the caterpillars from the ground for easy steering on caster wheel,
engages/disengages the drive wheel having ratchet clutch in the
detachable wheel hub to idle the drive wheel/caterpillars for converting
from/to manual drive to/from drive by auxiliary power source, and
prevents the drive wheel from rolling backward during climbing inclines
and controls speed continuously on a slope by a band brake means. So the
disabled persons on their legs can travel to outdoors by himself/herself
without a care of neighbors.