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US 2004/0070292 A1Published application
Motor
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsYouichi Fujita, Sotsuo Miyoshi, Satoru Hasegawa, Katsunori Takai
Life of this patent
Estimating the term…
Abstract
Powder produced by abrasion due to sliding between a brush and a commutator is prevented from moving toward a rotor. A recess is provided between the rotor and a slide face of the brush and the commutator, where powder produced by abrasion at the brush may enter into a motor and increase sliding resistance of the rotor. Thus, there is no such powder produced by abrasion entering into the motor as increasing sliding resistance of the rotor.
Claims8
A motor comprising:
- a brush;
- a commutator onto which said brush comes in contact and slides;
- a core round which a coil is wound through a bobbin and in which a magnetic field is generated by applying an electric current from the brush to said coil;
- and a rotor provided with a magnet;
- wherein a recess is formed between a slide face of said brush and said commutator and said rotor in order to prevent powder produced by abrasion due to sliding between said brush and said commutator from moving to said rotor.
2 more elements
A motor comprising:
- a core round which a coil is wound through a bobbin and in which a magnetic field is generated by applying an electric current to said coil;
- a stator formed by integrally molding said coil, bobbin, and core;
- a rotor provided with a magnet;
- and a boss supporting an end of said rotor and tightly shielding a space between said rotor and said stator from one end side of said rotor;
- wherein both said boss and said stator are provided with irregularities at a part of a contact face therebetween.
2 more elements
A motor comprising:
- a core round which a coil is wound through a bobbin and in which a magnetic field is generated by applying an electric current to said coil;
- a stator formed by integrally molding said coil, bobbin and core;
- a rotor provided with a magnet;
- and a cover made of a resin that covers tightly an end of the stator by being welded to the end of said stator;
- wherein, after disposing a resistance wire in a groove provided on said stator and inserting a protruding part of said cover in said groove, an electric current is applied to said resistance wire so that said stator and said cover are welded together;
- and
- wherein a recess is provided around said protruding part of said cover in a direction opposite to said protruding part.
4 more elements
A motor comprising:
- a core round which a coil is wound through a bobbin and in which a magnetic field is generated by applying an electric current to said coil;
- a stator formed by integrally molding said coil, bobbin and core;
- a rotor provided with a magnet;
- and a cover made of a resin that covers tightly one end of said stator by being welded to the end of said stator;
- wherein, after disposing a resistance wire in a groove provided on said stator and inserting a protruding part of said cover in said groove, an electric current is applied to said resistance wire, so that said stator and said cover are welded together:
- and
- wherein a protruding part is provided along said resistance wire at a port for leading out and connecting said resistance wire to an outside power supply.
4 more elements
A motor comprising:
- a brush;
- a commutator onto which said brush comes in contact and slides;
- a core round which a coil is wound through a bobbin and in which a magnetic field is generated by applying an electric current from the brush to said coil;
- a rotor provided with a magnet;
- and a terminal which is fixed to said bobbin, and to which said coil is soldered;
- a stator formed by integrally molding said coil, bobbin and core;
- and a protruding part which is formed by bending from said terminal, and to which said coil is soldered.
4 more elements
Dependencies are inferred from the claim text.