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DC motor for fuel pumps and carbon brush

A fuel pump and carbon brush technology, applied in electrical components, electromechanical devices, etc., can solve the problems of carbon brush 30 wear and life less than 3000 hours, etc., and achieve the effect of life improvement

Inactive Publication Date: 2019-06-18
日本永磁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the surface of the carbon brush 30 used in the "DC motor" described in Patent Document 1 that is in sliding contact with the outer peripheral surface of the commutator (commutator) 26 is formed in a planar shape. Therefore, when this "DC motor" is used for example In the case of a fuel pump for a motorcycle, there is a problem that the service life of the carbon brush 30 is less than 3,000 hours due to wear.

Method used

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  • DC motor for fuel pumps and carbon brush
  • DC motor for fuel pumps and carbon brush
  • DC motor for fuel pumps and carbon brush

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Embodiment Construction

[0045] Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings.

[0046] figure 1 represents an embodiment of the DC motor for fuel pump of the present invention, therefore figure 1 (A) is its left view, figure 1 (B) is its main view, figure 1 (C) is its right view, figure 1 (D) is its stereogram. in addition, figure 2 yes figure 1 A-A sectional view of (A).

[0047] exist figure 1 and figure 2 In the fuel pump DC motor 100 of the present invention, a rotor 20 and a magnet 30 are accommodated in a cylindrical casing 10 , and a bracket 50 is provided at one end, and the bracket 50 accommodates a carbon brush assembly 400 .

[0048] Among them, the rotor 20 has: a transmission shaft 24; a rotor core 22 installed on the transmission shaft 24 and constituting an armature on which the coils 21 are respectively wound, for example, three phases; The flow flows sequentially to the commutator 23 of the coil ...

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Abstract

The invention provides a DC motor for fuel pumps and a carbon brush, and aims at improving the life by leaps. The DC motor (100) for fuel cells comprises the carbon brush (40) in sliding contact withthe periphery of a commutator (23); and on the surface, in sliding contact with the commutator (23), of the carbon brush (40), a concave part (40-1) along the rotation direction of a rotor (20) is formed, a shape for enabling the carbon brush (40) and the commutator (23) to make sliding contact at two places on the axial direction of the rotor (20) is provided, and erection parts (40-2) which areerected at the two places on the axial direction of the rotor (20) and have uniform thicknesses are provided.

Description

technical field [0001] The present invention relates to a DC motor and a carbon brush for a fuel pump, and more particularly, to a DC motor and a carbon brush for a fuel pump whose life is greatly improved. Background technique [0002] Conventionally, a "DC motor" disclosed in Patent Document 1 is known as such a DC motor using carbon brushes. [0003] In “DC Motor” described in Patent Document 1, there is described a carbon brush 30 built in a carbon brush holder 31 fixed to a brush holder 18 and in sliding contact with the outer peripheral surface of a commutator 26 . [0004] However, the surface of the carbon brush 30 used in the "DC motor" described in Patent Document 1 that is in sliding contact with the outer peripheral surface of the commutator (commutator) 26 is formed in a planar shape. Therefore, when this "DC motor" is used for example In the case of a fuel pump for a motorcycle, there is a problem that the life of the carbon brush 30 is less than 3000 hours du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K13/00
Inventor 藤川和丰
Owner 日本永磁有限公司