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Brushless motor

A brushless motor and motor shaft technology, used in electric components, electrical components, electromechanical devices, etc., can solve problems such as the inability of the stopper to fit securely, the increase in the production cost of parts, the complexity of the mold assembly, and the inability to reduce noise.

Inactive Publication Date: 2009-10-14
SHINANO KENSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the noise between the adjusting washer 59 and the end face 57a of the bearing cannot be reduced
[0007] exist Figure 4 In the limiting structure shown and the limiting structure disclosed in the Japanese Patent Gazette, a gasket with an opening, a metal snap ring and a resin molded part with an opening are used as the limiting member, so there is an increase in the production cost of the part and the complication of the mold assembly The problem
On the other hand, if no opening or slit is formed, the stopper cannot be securely fitted in the annular groove and a sufficiently strong stopper structure cannot be produced

Method used

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Examples

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Embodiment Construction

[0028] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the following description, a blower motor (outer rotor type DC brushless motor) will be described as an example.

[0029] Refer below figure 1 Describes the outline of the hair dryer motor.

[0030] exist figure 1 In the rotor shown, the impeller 2 and the cylindrical rotor yoke 3 are integrally formed by insert molding. One end of the motor shaft 5 is integrated with the hub 4 of the impeller 2 . Ring magnet 6 is fixed on the inner peripheral surface of rotor yoke 3 . In the magnet 6, N poles and S poles are alternately formed in the circumferential direction. The motor shaft 5 is supported in the radial direction and thrust direction by the bearing portion 8 inserted in the bearing housing 7 .

[0031] In the stator 9, a stator core 10 is attached to the outside of a cylindrical bearing frame 7 made of metal. The stator core 10 is cov...

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PUM

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Abstract

A brushless motor includes a rotor; a motor shaft supporting the rotor; a bearing section radially supporting the motor shaft; a thrust receiving section receiving an end of the motor shaft in the thrust direction; and an elastic damper ring being fitted on the motor shaft, the elastic damper ring being located between a circular groove, which is formed in the vicinity of the end of the motor shaft received by the thrust receiving section, and an end face of the bearing section.

Description

technical field [0001] Embodiments described herein relate to brushless motors used in office automation equipment such as printers, copiers, and DVD drive units, and in-vehicle equipment such as thin-plate air conditioners, cooling blowers, and projectors. Background technique [0002] First, a conventional outer rotor type DC brushless motor will be described. A cylindrical frame is attached to the motor casing, the bearing portion is attached to the inside of the frame, and the motor circuit board and stator core are attached to the outside thereof. A rotor with magnets is integrally attached to the motor shaft, and the motor shaft is inserted into the housing and rotatably supported by the bearing portion. The frame is integrally attached to the motor housing. [0003] Such as Figure 4 As shown, a stop washer 56 having an opening 56a fits in an annular groove formed in the end 52 of the motor shaft 51, which supports the rotor as a stop. Adjustment washers 58 and 59 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K5/24
CPCH02K5/24H02K5/163
Inventor 児玉雄二
Owner SHINANO KENSHI
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