Structure of Rotation Detector-Equipped Motor and a Manufacturing Method Thereof

A structure of a rotation detector-equipped motor comprising a rotation detector including a detection rotor and a detection stator placed to face the detection rotor,

• wherein the motor includes a motor case and a motor shaft,
• the detection rotor includes a plate and a coil provided on the plate,
• the plate is fixed to an end of the motor shaft,
• the motor shaft includes a recess in the end,
• the plate has a circular disc shape and includes a cylindrical portion located in the center and protruding on a back side,
• the cylindrical portion is press-fitted in the recess of the motor shaft and the plate is fixed to the end of the motor shaft,
• the cylindrical portion is formed, on an outer periphery thereof, with a key extending in an axial direction,
• the recess of the motor shaft is formed with a key groove conforming to the key,
• the cylindrical portion is formed, on an outer periphery thereof, with a plurality of engagement lugs turned outward,
• the cylindrical portion is formed, at an end thereof, with an inward flange, and the plate is made of a non-magnetic material.