Electric motor, and motor with a reduction gear

An electric motor and armature technology, which is applied in the field of electric motors, can solve the problems of large changes in magnetic flux, reduce the changes in magnetic attraction and repulsion, ensure the space of the package, and increase the number of turns of the package.

Active Publication Date: 2012-04-11
MITSUBA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the case of using a rectifier-type permanent magnet, since a gap is formed between the permanent magnets, the change in the magnetic flux becomes large with the circumferential ends of the permanent magnets as boundaries.

Method used

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  • Electric motor, and motor with a reduction gear
  • Electric motor, and motor with a reduction gear
  • Electric motor, and motor with a reduction gear

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0068] (motor with reducer)

[0069] Next, based on Figure 1 to Figure 6 A first embodiment of the present invention will be described.

[0070] figure 1 It is a perspective view of the electric motor 1 with a speed reducer. figure 2 It is an exploded perspective view of the motor 1 with a speed reducer. Figure 3A and Figure 3B Indicates electric motor 2, Figure 3A is an exploded perspective view, Figure 3B yes Figure 3A An enlarged view of the armature 6 in .

[0071] Such as Figure 1 ~ Figure 3B As shown, an electric motor 1 with a speed reducer is used, for example, as a driving source of a power window device of a vehicle, and it includes an electric motor 2 and a worm reduction mechanism 3 connected to the rotating shaft 12 of the electric motor 2, and the electric motor 2 and the worm reduction mechanism 3 A connector unit 4 for supplying electric power to the electric motor 2 is provided between the mechanisms 3 .

[0072] (electric motor)

[0073] ...

no. 2 approach

[0181] Next, based on Figure 7 A second embodiment of the present invention will be described.

[0182] Figure 7 It is a longitudinal sectional view of the motor case 5 of the second embodiment. In addition, the same code|symbol is attached|subjected and demonstrated about the same form as 1st Embodiment, but the description is abbreviate|omitted (it is also the same in the following embodiment).

[0183] In this second embodiment, the following basic structure is the same as that of the above-mentioned first embodiment (it is also the same in the following embodiments): the electric motor 1 with a speed reducer is used, for example, as a drive source of a power window device of a vehicle, and Comprising an electric motor 2 and a worm reduction mechanism 3 connected to the rotating shaft 12 of the electric motor 2, a connector unit 4 for supplying electric power to the electric motor 2 is provided between the electric motor 2 and the worm reduction mechanism 3; the electri...

no. 3 approach

[0188] Next, based on Figure 8A and Figure 8B A third embodiment of the present invention will be described.

[0189] Figure 8A and Figure 8B Showing the motor casing 205 of the third embodiment, Figure 8A is the side view, Figure 8B is along Figure 8A Sectional view of the B-B line.

[0190] Here, if Figure 8A , Figure 8B As shown, the difference between the first embodiment and the third embodiment is that the yoke 8 of the first embodiment shown is formed in a substantially hexagonal shape when viewed from above in the axial direction, while the yoke 208 of the third embodiment is formed as It is roughly dodecagonal in plan view along the axial direction.

[0191] The motor housing 205 is a member formed by drawing a metal plate by pressing or the like, and is composed of a bottomed cylindrical yoke portion 208 and an oblong brush holder housing portion 9, wherein the brush holder housing portion 9 It is formed integrally with the end of the opening 208 a...

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PUM

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Abstract

In an electric motor, the peripheral wall of a yoke is formed in a polygonal shape in plan view in the axial direction. A permanent magnet is arranged in a flat section of the peripheral wall. A first bearing section for rotatably supporting one end of a rotary shaft is integrally formed in the bottom wall of the yoke. A brush holder accommodating section that is capable of accommodating a brush holder unit that holds a brush is integrally formed in the opening of the yoke.

Description

technical field [0001] The present invention relates to, for example, an electric motor mounted on a vehicle and an electric motor with a speed reducer using the electric motor. [0002] This application claims the priority of Japanese Patent Application No. 2009-112131 for which it applied in Japan on May 1, 2009, and uses the content here. Background technique [0003] As an electric motor, for example, there is an electric motor with brushes in which a plurality of commutator-type permanent magnets are arranged on the inner peripheral surface of a bottomed cylindrical yoke, and an armature is rotatably mounted on the permanent magnet. radially inward of the magnet. The armature has an armature core fixed on the rotating shaft and a rectifier (Japanese: コンミテタタ) equipped with a plurality of rectifying pieces. The armature core is provided with a plurality of pole teeth extending radially outward, and a plurality of axially longer slots are formed between the pole teeth. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K23/04H02K7/116H02K13/00
CPCH02K5/225H02K7/081H02K5/148H02K23/04H02K1/17H02K7/1166
Inventor 安中智彦根岸觉盐田直树山上源作
Owner MITSUBA CORP
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