Method of manufacturing commutator having commutator pieces each

Details Method of manufacturing commutator having commutator pieces each Method of manufacturing commutator having commutator pieces each

1994-05-27

1996-12-17

Hall, Carl E.

Metal working

Method of mechanical manufacture

Electrical device making

310235, H01R 4304

Patent

active

055841155

ABSTRACT:
A commutator for electric motors which is highly durable and which can be manufactured at lower cost and by a simpler method includes forming the commutator pieces on the outer periphery of the insulating resin material by providing slits between the commutator pieces. Formed on the inner periphery of the commutator pieces are a pair of engagement claws which face each other and become closer to each other in the radially inwardly extending direction. A filling space part which diminishes in the radially inwardly extending direction is formed between the pair of engagement claws, and an axial end claw which links the pair of engagement claws is formed on the axial end of the commutator piece. Furthermore, a cut part which links the filling space part is formed on the axial end claw in correspondence to the filling space part.

REFERENCES:
patent: 3140414 (1964-07-01), Skjodt et al.
patent: 4920633 (1990-05-01), Wojcik
patent: 5204574 (1993-04-01), Kanno et al.

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