A tire wheel structure that avoids the adverse effect of the increase in
the unsprung mass associated with the presence of a driving motor at the
time of a road surface input to a tire wheel is provided. In the tire
wheel structure, the driving motor is disposed near the tire wheel that
is supported on a vehicle body. The driving motor drives the tire wheel
by transferring driving force to the tire wheel. The output shaft of the
driving motor is connected to a wheel of the tire wheel via a flexible
coupling. The driving motor is supported by a knuckle member of a
suspension via coil springs and absorbers so that the driving motor is
relatively displaceable with respect to the tire wheel.