Axial air gap type electric motor

A technology of axial air gap and motor, which is applied in the direction of electric components, synchronous motors with stationary armature and rotating magnets, electromechanical devices, etc., can solve problems such as damage, failure, and large effect, and achieve the goal of preventing damage Effect

Active Publication Date: 2008-05-21
FUJITSU GENERAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From this point of view, since the axial air gap motor described in Patent Document 1 is provided with two bearings close to each other in the inner peripheral space of the stator, the force acting from the direction perpendicular to the axis is relatively weak. It is weak, but if such a force acts in an axially inclined direction, a large force will act on the ball bearing of the bearing part, which will cause damage, and there is a possibility that the bearing part will loosen
Furthermore, if the bearing part is loose, in some cases, the magnets on the rotor and the stator will also be released and there is a high possibility of failure.

Method used

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Embodiment 1

[0040] Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view schematically showing the internal structure of an axial air gap motor according to the present invention. As shown in FIG. 1 , an axial air-gap motor 10 includes a substantially disk-shaped stator 11 and a pair of rotors 12 and 13 disposed opposite to each other with a predetermined gap on both sides of the stator 11. The rotors 12 and 13 The same rotor output shaft 14 is shared, and the stator 11 has a bearing portion 15 for supporting the rotor output shaft 14 on its inner peripheral side.

[0041] The stator 11 includes a ring-shaped (so-called toroidal) stator core 16 and a bearing portion 15 coaxially inserted into the inner peripheral side of the stator core 16 , which are integrally molded from a synthetic resin 18 .

[0042] In addition, in this description, when a bearing part is shown, it means the whole structure which fixes a shaft includ...

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Abstract

The object is to provide an axial air gap type electric motor in which even if a large force to some extent is added to the vertical direction to the rotor output axis, the bearings don't damage and its long lifetime is realized. The axial air gap type electric motor comprises a stator and two rotors each of which is configured almost with a discoid shape and which are arranged as facing an identical rotation axis (rotor output axis) with a fixed gap. Said stator has a stator core comprising multiple pole members connected annually and one of the bearings for fixing the rotor output axis is installed inside said stator configured annually and another bearing is installed on the rotor output axis between the outside of said rotor and the load connected.

Description

technical field [0001] The present invention relates to an axial air-gap motor, which includes a stator and a rotor respectively formed in a substantially disk shape and disposed opposite to each other with a predetermined gap on the same rotating shaft. A configuration of an axial air gap motor that achieves torque boost without increasing the winding diameter. Background technique [0002] Conventionally, there is an axial air gap motor (axial gap motor) as one type of electric motor. Axial air-gap motors are motors in which rotors are arranged opposite to each other in the axial direction with a predetermined gap on a disc-shaped stator. Compared with radial air-gap motors, the axial length can be shortened to realize the motor itself. Advantages of thinning. For example, the present applicant has already applied for Patent Document 1 regarding such an axial air-gap motor. stator assembly work. [0003] In addition, as in Patent Document 2, various electric bicycles h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/24H02K5/16H02K7/08H02K1/14H02K1/27
CPCH02K7/085H02K21/24H02K3/522
Inventor 小岛智则丹野俊昭前山研松崎博和
Owner FUJITSU GENERAL LTD
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