Motor with salient pole having extending magnetic flux collecting plate
First Claim
1. A motor comprising:
- an armature core including a plurality of salient poles each including a radially projecting arm portion and a bow-shaped portion formed in a leading end portion of said arm portion and spreading out on two sides thereof;
a drive coil wound around said arm portion;
a magnet opposed to an outer peripheral surface of said armature core;
a magnetic flux collecting plate formed of a magnetic material mounted on an outer peripheral surface of said bow-shaped portion, said magnetic flux collecting plate including;
a circumferential-direction extension portion extending, in a circumferential-direction of said armature core, from two circumferential end portions of said bow-shaped portion;
an axial-direction extension portion extending, in an axial direction of said armature core, from at least one of two axial end portions of said bow-shaped portion; and
a positioning engagement portion bent toward said bow-shaped portion and engageable with said bow-shaped portion,wherein at least one of said magnet and said armature core is rotatable.
1 Assignment
0 Petitions
Accused Products
Abstract
In the motor (1), when a drive coil (17) is wound around a salient pole (114), the opening width of an armature core (11) is kept sufficiently large to be able to wind the drive coil (17) properly and easily. After the drive coil (17) is wound, a magnetic flux collecting plate (50) including a peripheral-direction extension portion (51) and an axial-direction extension portion (52) is mounted onto the outer peripheral surface (118) of a bow-shaped portion (117) of the salient pole (114.) In this mounting operation, two pawl-shaped positioning engagement portions (55) respectively formed in the magnetic flux collecting plate (50) are fitted into grooves (119) which are respectively formed in the upper and lower end faces of the armature core (11).
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Citations
8 Claims
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1. A motor comprising:
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an armature core including a plurality of salient poles each including a radially projecting arm portion and a bow-shaped portion formed in a leading end portion of said arm portion and spreading out on two sides thereof; a drive coil wound around said arm portion; a magnet opposed to an outer peripheral surface of said armature core; a magnetic flux collecting plate formed of a magnetic material mounted on an outer peripheral surface of said bow-shaped portion, said magnetic flux collecting plate including; a circumferential-direction extension portion extending, in a circumferential-direction of said armature core, from two circumferential end portions of said bow-shaped portion; an axial-direction extension portion extending, in an axial direction of said armature core, from at least one of two axial end portions of said bow-shaped portion; and a positioning engagement portion bent toward said bow-shaped portion and engageable with said bow-shaped portion, wherein at least one of said magnet and said armature core is rotatable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification