Plane commutator and method of manufacturing the same
First Claim
1. A plane commutator comprising:
- a plurality of commutator segments made of carbon compound and having a commutator surface at one end thereof, a commutator segment outer periphery at an outer side thereof, and a base portion at the other end thereof;
a resinous boss member having a first support portion supporting said base portion of said plurality of commutator segments, a second support portion supporting said outer periphery of said plurality of commutator segments, and a plurality of bridge portions connecting said first and second support portions; and
a plurality of metal base plates, each said base plate having a contact portion in contact with said base portion of a respective one of said commutator segments, an axial portion extending from said contact portion along an outer peripheral portion of said first support portion, an opening in which one of said bridge portions is filled between said first and second support portions and a terminal portion extending radially outwardly from said axial portion;
wherein said axial portion is disposed in parallel to said commutator outer periphery and adjacent said second support portion so that said axial portion and said second support portion define respective portions of an outer peripheral surface of the plane commutator, and wherein said first support portion and said second support portion are separated from each other throughout an extent of said outer peripheral surface of the plane commutator by said axial portion.
1 Assignment
0 Petitions
Accused Products
Abstract
A plane commutator includes a plurality of commutator segments made of carbon compound, a resinous boss member having a body portion supporting a base portion of the commutator segments and an outer peripheral portion supporting an outer periphery of the same and a plurality of metal base plates. Each metal base plate has a contact portion in contact with the base portion of the commutator segment, an axial portion extending along a peripheral portion of the boss member and a terminal portion. The axial portion of the metal base plates is disposed on an outer periphery of the plane commutator in parallel with the outer peripheral portions of the boss member to separate the outer peripheral portion from the body portion. The outer peripheral portion moves freely from the body portion as the metal base plates thermally expand.
17 Citations
7 Claims
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1. A plane commutator comprising:
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a plurality of commutator segments made of carbon compound and having a commutator surface at one end thereof, a commutator segment outer periphery at an outer side thereof, and a base portion at the other end thereof;
a resinous boss member having a first support portion supporting said base portion of said plurality of commutator segments, a second support portion supporting said outer periphery of said plurality of commutator segments, and a plurality of bridge portions connecting said first and second support portions; and
a plurality of metal base plates, each said base plate having a contact portion in contact with said base portion of a respective one of said commutator segments, an axial portion extending from said contact portion along an outer peripheral portion of said first support portion, an opening in which one of said bridge portions is filled between said first and second support portions and a terminal portion extending radially outwardly from said axial portion;
whereinsaid axial portion is disposed in parallel to said commutator outer periphery and adjacent said second support portion so that said axial portion and said second support portion define respective portions of an outer peripheral surface of the plane commutator, and wherein said first support portion and said second support portion are separated from each other throughout an extent of said outer peripheral surface of the plane commutator by said axial portion. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification