Overhead vehicle having spring-biased, rail-urged lever-mounted guide wheel for electrically powered drive wheel

A vehicle actuated by an electric motor, comprising:

• a vehicle body,
• a driving wheel journalled on a first shaft mounted to said vehicle body for travelling along a supporting rail and an auxiliary guide wheel associated with a cooperating guide rail, said driving wheel and auxiliary guide wheel having respective outer peripheral surfaces,
• said auxiliary guide wheel being journalled on a second shaft which is movable relative to said first shaft of the driving wheel, said auxiliary guide wheel being mounted on one end of a longitudinal lever articulated at an opposite end to said vehicle body in a floating arrangement, and acted upon by a spring,
• said second shaft being movable longitudinally of said longitudinal lever along a slot formed in said longitudinal lever, said second shaft being constantly thrust upwards by a second spring tending to separate the outer peripheral surfaces of said wheels from one another,
• angular rotation of said lever being limited by an upper stop secured to said vehicle body.