Patent ID: 8161630

Claim:
A rotor attachment apparatus for coupling a rotor of a motor to a crankshaft of an engine by inserting the rotor into a rotor housing that is attached to the engine when the motor is to be attached coaxially with the crankshaft, the rotor attachment apparatus comprising: a rotor support member that faces a lateral face of the rotor in an axis direction of the rotor; rotor positioning members that are protrudingly provided on the rotor support member and engage some of a plurality of bolt insertion holes provided in the rotor for coupling to the crankshaft; a temporary fixation bolt that temporarily fixes the rotor on the rotor support member in a state where the rotor is positioned with respect to the rotor support member by the rotor positioning members; a drive shaft which is arranged coaxially with the rotor, a tip portion of which is engaged with a shaft end portion of the crankshaft, and which supports the rotor support member movably in the axis direction via a screw mechanism; a base member that is arranged on a side of the rotor support member opposite to the rotor and moves the rotor support member toward and away from the rotor while rotatably supporting a base end of the drive shaft; base positioning members that are protrudingly provided on the rotor housing side of the base member and engage the rotor housing; and a fastening mechanism which engages a head of a coupling bolt inserted into at least one of the bolt insertion holes other than the ones to be engaged with the rotor positioning members, to thereby impart a torque to the head of the coupling bolt, and which is supported by the rotor support member so as to bias the coupling bolt toward the rotor.