Armature core, armature, and electric motor

Patent metadata

Field	Value
Publication number	US-2016352176-A1
Application number	US-201515117171-A
Country	US
Kind code	A1
Filing date	Mar 4, 2015
Priority date	Mar 5, 2014
Publication date	Dec 1, 2016
Grant date	—

Abstract

An armature core ( 8 A) includes a plurality of teeth ( 12 ) that radially extend. A plurality of coils ( 91 ), ( 92 ), and ( 93 ) are wound in a concentrated winding manner on a winding drum portion ( 12 a ) of each tooth; a winding wire ( 14 ) of a lowermost side of at least a first-layer coil is wound so as to come into close contact with a winding surface of a base end side of the winding drum portion; a second-layer coil, which is to be wound later, is wound so that at least a part of the second-layer coil overlaps the first-layer coil; and a step ( 12 a 1 ) as a regulating portion, which regulates the positional deviation of the winding wire of the lowermost side of the first-layer coil in an extending direction of the winding drum portion, is provided on at least a part of the winding surface for the first-layer coil on an outer periphery of the winding drum portion.

First claim

1 . An armature core comprising:
a plurality of teeth that are provided on an outer periphery of an annular core body and radially extend outward in a radial direction, wherein a plurality of coils are wound on a winding drum portion of each tooth; a winding wire of a lowermost side of at least a first-layer coil is wound so as to come into close contact with a winding surface of a base end side of the winding drum portion; a second-layer coil, which is to be wound later, is wound so that at least a part of the second-layer coil overlaps the first-layer coil, and a regulating portion, which regulates the positional deviation of the winding wire of the lowermost side of the first-layer coil in an extending direction of the tooth, is provided on at least a part of the winding surface for the first-layer coil on an outer periphery of the winding drum portion.

2 . The armature core according to claim 1 ,
wherein the regulating portion is provided on at least one side surface of both side surfaces of the winding drum portion in a width direction when seen in an axial direction of the core body.

3 . The armature core according to claim 1 ,
wherein the regulating portion is formed in a middle of the winding drum portion in the extending direction or on an inner side of the middle of the winding drum portion in the extending direction.

4 . The armature core according to claim 1 ,
wherein the regulating portion is formed by a step that is provided at an end part of an outer side of the winding surface for the first-layer coil in the extending direction, and with the step as a boundary, a height of the winding surface for the first-layer coil on an inner side in the extending direction is set to be lower than a height of the winding surface on an outer side in the extending direction.

5 . The armature core according to claim 4 ,
wherein a difference in height of the step is set to be equal to or larger than a radius of the winding wire that forms the coil.

6 . The armature core according to claim 1 ,
wherein the regulating portion is a concave portion to which the winding wire forming the coil is fitted and which is formed at the end part of the outer side of the winding surface for the first-layer coil in the extending direction, and a depth of the concave portion is set to be equal to or smaller than the radius of the winding wire.

7 . An armature in which a plurality of coils are sequentially wound in a concentrated winding manner on the winding drum portion of each tooth of the armature core according to claim 1 , and a second or later-layer coil is wound so that at least a part of the second or later-layer coil overlaps a first-layer coil after the first-layer coil is wound so that a winding wire of a lowermost side comes into close contact with the winding surface of the winding drum portion.

8 . An electric motor comprising:
the armature according to claim 7 , and a magnet that generates a magnetic attractive force or a repelling force with respect to a magnetic field formed by the armature.

Assignees

• Mitsuba Corp

Inventors

• Tokizaki Teppei
• Hoshino Akio
• Tamura Natsumi
• Tamura Satoshi

Classifications

• H02K3/527 Primary

  applicable to rotors only · CPC title

• H02K3/52

  Fastening salient pole windings or connections thereto · CPC title

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K7/1166

  comprising worm and worm-wheel (structural association with bearings specially adapted for worm gear drives H02K7/081) · CPC title

• H02K1/265

  Shape, form or location of the slots · CPC title