Method of manufacturing segment for flat commutator

A technology of a commutator piece and a manufacturing method, which is applied in the manufacture of commutators, the manufacture of stator/rotor bodies, electromechanical devices, etc., can solve the problems of unfavorable manufacturing costs, poor material utilization, and low surface hardness, and achieve cheap processing. Effect
CN1723598AActive Publication Date: 2006-01-18MITSUBA CORP
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
MITSUBA CORP
Publication Date
2006-01-18

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Abstract

A method of manufacturing a segment (3) for a flat commutator, comprising the steps of forming a theta section bar (15) having the same cross sectional shape as that of the segment (3) by drawing, punching out the theta section bar (15) in a direction Z perpendicular to a drawing direction X to form the segment (3) for the flat commutator, wherein the drawing direction X for the theta section bar (15) is aligned in the generally same direction as the slidable contact direction of a brush on the segment (3) and a draw-finished surface is formed to be used as a brush sliding surface (4) of the segment (3), and an anchor part (14) forming an extraction stopper for the segment (3) is formed on the theta section bar (15) in drawing, whereby the segment for the flat commutator capable of preventing the leakage of resin in a resin mold process can be easily manufactured at a low cost.
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Description

technical field

[0001] The present invention relates to a method for manufacturing a commutator for a rotating electrical machine, and in particular to a method for manufacturing commutator segments in a disk-type flat commutator. Background technique

[0002] In recent years, among motors used in electric power steering devices, engine starters, fuel pumps, etc., motors using flat type commutators (planar commutators) have appeared due to demands for device miniaturization. Unlike common cylindrical commutators, this flat commutator has a disk-shaped brush sliding surface extending radially from the axis of rotation, and is integrally molded with a metal part called commutator metal and synthetic resin. After integral molding, the commutator metal is cut radially and separated in the circumferential direction to form a plurality of commutator segments in a mutually insulated state. In addition, the brush is in sliding contact with the brush sliding surface made of the comm...

Claims

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