SPINDLE MOTOR, MORE SPECIFICALLY RELATED TO FIRST COUPLING A ROTOR YOKE WITH A TURN TABLE BY USING ANOTHER COUPLING UNIT, AND THEN AXIS-COUPLING TO A SHAFT

摘要

PURPOSE: A spindle motor is provided to couple a rotor yoke with a turn table by using another coupling unit, and to simultaneously press the coupled rotor yoke and the turn table at a shaft, thereby preventing a pressed part of the turn table from being transformed during an assembling while preventing the turn table from being isolated from the shaft. CONSTITUTION: A stator is formed by mounting a core assembly(123) consisting of plural cores and coil winding portions(123a) on an outer wall of a bearing housing(120). A shaft(140) is inserted into a metal bearing(121) mounted on the bearing housing(120). A rotor yoke(131) and a turn table(150) are fixed to the shaft(140) extended outside the bearing housing(120). The rotor yoke(131) is formed with plural insertion holes(131a), and is attached by a magnet(133) opposite to the core assembly(123), to form a rotor. The turn table(150) is fixed to the shaft(140) extended upward the rotor yoke(131), and rotates with the rotor.