MOTOR

摘要

A motor includes an armature arranged radially outside a rotor magnet, and a casing configured to fix the armature and hold upper and lower bearings configured to rotatably support a shaft at a radial center thereof. The armature includes a stator core, an insulator arranged to cover the stator core, coils each of which is defined by a conducting wire wound around a separate one of magnetic pole teeth with the insulator intervening therebetween, and passage lines each of which is arranged circumferentially between adjacent ones of the magnetic pole teeth to electrically connect one of the coils and another one of the coils with each other. The insulator includes magnetic pole tooth insulating portions arranged to cover a separate one of the magnetic pole teeth; and a core back insulating portion integral with each magnetic pole tooth insulating portion.

主权项

1. A motor comprising:
a bearing portion including an upper bearing and a lower bearing; a shaft including a central axis extending in a vertical direction as a center thereof, and rotatably supported by the bearing portion; a rotor magnet configured to rotate together with the shaft; an armature arranged radially outside the rotor magnet; and a casing configured to fix the armature and hold the upper and lower bearings at a radial center thereof, the upper and lower bearings being configured to rotatably support the shaft; wherein the armature includes:
a stator core including an annular core back and a plurality of magnetic pole teeth arranged to project radially inward from the core back;an insulator arranged to cover at least an upper surface and a lower surface of each of the plurality of magnetic pole teeth of the stator core;coils each of which is defined by a conducting wire wound around a separate one of the plurality of magnetic pole teeth with the insulator intervening therebetween; andpassage lines each of which is arranged circumferentially between adjacent ones of the plurality of magnetic pole teeth to electrically connect one of the coils and another one of the coils with each other; the insulator includes:
magnetic pole tooth insulating portions each of which is arranged to cover a separate one of the plurality of magnetic pole teeth; anda core back insulating portion integral with each of the plurality of magnetic pole tooth insulating portions, and arranged to cover at least portions of upper and lower end surfaces of the core back; the core back insulating portion includes:
a plurality of passage line guide walls each of which is arranged to project in an axial direction away from a surface covering the core back between the casing and at least one of the passage lines;a plurality of passage line holding portions each of which is arranged to project in the axial direction away from the surface covering the core back, and each of which is arranged to support at least one of the passage lines with a radially outer surface thereof radially inside a separate one of the passage line guide walls; anda plurality of coil guide walls each of which is arranged to project in the axial direction away from the surface covering the core back, and each of which is arranged radially opposite a radially outer side of a corresponding one of the coils radially outside a corresponding one of the plurality of magnetic pole teeth; and an upper end of a portion of each passage line guide wall which is radially opposed to a corresponding one of the passage line holding portions is arranged at an axial level lower than an axial level of an upper end of the corresponding passage line holding portion.