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Rotating dynamoelectric machine

A technology for rotating electrical machines and bearings, which is applied to electromechanical devices, electrical components, mechanical equipment, etc., can solve the problems of increased manufacturing costs of bearings, wear of bearing accommodating parts, inability to suppress bearing slippage, etc., and achieves the effect of cost reduction

Inactive Publication Date: 2007-08-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the conventional automotive alternator, it is necessary to form an annular groove on the outer peripheral surface of the outer ring part for the resin belt to prevent slipping, and the manufacturing cost of the bearing increases, which becomes the low cost of the automotive alternator. Barriers to Costing
[0004] In addition, since the resin band is arranged not in the entire area of ​​the bearing axial direction but in a partial area, when an excessive load is applied, the occurrence of slipping of the bearing cannot be suppressed, and there is a risk of wear and damage to the bearing housing. sex

Method used

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  • Rotating dynamoelectric machine
  • Rotating dynamoelectric machine
  • Rotating dynamoelectric machine

Examples

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Embodiment Construction

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0016] Embodiment 1

[0017] Fig. 1 is a longitudinal cross-sectional view showing a vehicle alternator according to Embodiment 1 of the present invention, Fig. 2 is a cross-sectional view of main parts around a bearing housing portion of a vehicle alternator according to Embodiment 1 of the present invention, and Fig. 3 shows A perspective view of the resin case and the rubber gasket in the vehicle alternator according to Embodiment 1 of the present invention.

[0018] In FIG. 1, the drive-side bracket 1 and the counter-drive-side bracket 2 are made of aluminum and formed into a bowl shape, and the bowl-shaped openings are opposed to each other and connected by a fastening bolt 3 to be integrated. The openings of the bottomed cylindrical drive side and counter drive side bearing housings 1a, 2a face inward, and are formed integrally with the center portions of the end face...

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PUM

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Abstract

A dynamoelectric machine can achieve cost reduction by omitting the formation of grooves on an outer peripheral surface of an outer ring (26) of a bearing (7), and it can also prevent creeping of the bearing (7), thereby suppressing damage to a bearing housing (2a). A resin case (30) is formed in the shape of a cylinder so as to cover the entire axial length of the outer ring (26) of the counter-driving side bearing (7), and slits (32) are formed in the resin case (30) so as to extend axially from one axial end thereof to the other axial end thereof. The resin case (30) is press-fitted into the counter-driving side bearing housing (2a) with the one axial end of the resin case (30) being located at an opening side of the counter-driving side bearing housing (2a). The counter-driving side bearing (7) is press-fitted into the resin case (30).

Description

Technical field [0001] The present invention relates to a rotating electric machine such as an alternator mounted on a vehicle, and particularly relates to a structure in which a bearing provided on a shaft end of a rotor is housed in a bearing housing portion of a bracket. Background technique [0002] In the conventional alternator for a vehicle, the bearing provided on the shaft end of the rotor is accommodated in the bearing accommodating portion provided on the rear bracket, and the rotor is rotatably supported on the rear bracket. The bearing has a roller part sandwiched between an outer ring part and an inner ring part, and the end of the rotor shaft is pressed into the inner ring part and integrated with the inner ring part. Furthermore, by fixing the outer ring portion to the bearing housing portion, the rotor can rotate. In addition, the annular groove is formed on the outer circumferential surface of the outer ring portion to be divided in the axial direction, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K5/16H02K5/10H02K5/14H02K5/173
CPCH02K5/141F16C35/077H02K5/1732F16C19/06F16C2380/26
Inventor 黑田元一高槻美由纪东野恭子
Owner MITSUBISHI ELECTRIC CORP