Electric motor drive system

Abstract

A structure for regulating the rotational direction of the output shaft of a hybrid vehicle is disclosed. The structure comprises a torque generating means for driving a drive wheel; a gear assembly unit including a first to a third element, the first element being adapted to receive a rotation from the torque generating means and the second element being adapted to transmit the rotation to an output shaft connected to the drive wheel; a case to house the gear assembly unit therein; and a rotation regulation means including a first coupler and a one-way clutch, the coupler and the one-way clutch being connected to the third element of the gear assembly unit, either of the coupler and the one-way clutch being disposed between the third element and the case, the other being disposed between the third element and a different one of the elements, so that the output shaft is only allowed to rotate in one direction when the coupler is coupled.

Dependencies are inferred from the claim text.