| 摘要 |
PURPOSE: A magnetic levitation armature shaft for vehicle motor is provided to improve durability of the shaft by maintaining a gap between two magnets with same polarity and improving the structure of magnet holder. CONSTITUTION: A magnet(12) is attached to an inner periphery of a housing(10) constituting an outer appearance of the motor, an armature shaft(18) having a core(20) wound along the outer periphery of the armature shaft is arranged to be rotatable in the lengthwise direction of the housing, and a commutator(26) for stably supplying electric power from an external source to the core is fixed to the armature shaft. The axial center of the magnet and the axial center of the core are offset by a predetermined distance, so as to provide the first gap(a). The armature shaft includes the first magnet(28) arranged to be adjacent to the commutator by the first holder(30); and the second magnet(32) arranged to face the first magnet by the second holder(34), in such a manner that the first magnet and the second magnet have the same polarity. The first holder has an axial length longer than the axial length of the first magnet.
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