Stator of motor

Abstract

A stator of a motor according to the invention includes a stator core 1 annularly continued, a plurality of insulators each having a body part which is engaged with an outer peripheral surface of a tooth part of the stator core and a flange part which is projected at a distal end side of the tooth part, and a coil which is wound around the tooth part by way of the insulator. A first magnetic body is provided on a surface of the flange part of the insulator opposed to a rotor, in a state magnetically connected to the tooth part.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of a stator of a motor in a first embodiment according to the invention.

FIG. 2 is an enlarged sectional view taken along a line (ii)-(ii) in FIG. 1.

FIG. 3 is a perspective view of an essential part of the stator in FIG. 1.

FIG. 4 is an enlarged sectional view of an essential part of a stator of a motor in a second embodiment according to the invention.

FIG. 5 is a perspective view of an essential part of a stator in a third embodiment according to the invention.

FIG. 6 is a sectional view of a part of a conventional brushless motor of inner rotor type.

FIG. 7 is an enlarged sectional view taken along a line (vii)-(vii) in FIG. 6.

Claims

1. A stator of a motor comprising: a annular stator core;tooth parts that project inward from the stator core in a radial direction of the stator core, each of the tooth parts including a flange part that is protruded at a distal end side of the tooth part;insulators each having a body part engaged with an outer peripheral surface of the tooth part;coils, each wound around the tooth part by way of the insulator; andfirst magnetic bodies, each provided on a surface of the flange part so as to opposed to a rotor, the first magnetic bodies being magnetically connected to the tooth part.

2. The stator according to claim 1 further comprising second magnetic bodies, each provided on an inner periphery of the body part of the insulator and contacting with the outer peripheral surface of the tooth part, the second magnetic body being magnetically connected to the first magnetic body.

3. The stator according to claim 1, wherein the tooth part includes protruded parts which are protruded from a distal end thereof to opposite sides in a circumferential direction of the stator, and the first magnetic body is provided at opposite sides of these protruded parts in an axial direction of the stator.