Power transmission structure of a motor assist apparatus for a vehicle

摘要

A power transmission structure of a motor assist apparatus for a vehicle, wherein a ring gear need not have a flywheel function, such that a width of a flywheel can be reduced and a length of a motor housing can be shortened. In a vehicle with front wheel drive, because the starter motor does not interfere with a drive shaft, the degree of freedom in layout of the drive shaft, starter motor and the like increases. A ring gear installation member mounting a ring gear on an outer circumferential location thereof is provided between a rotor installation member (which mounts thereon a motor rotor of the engine) and a crank shaft of the engine.