Mold structure for manufacturing brush holder as part of an inte

Details Mold structure for manufacturing brush holder as part of an inte Mold structure for manufacturing brush holder as part of an inte

1992-05-19

1993-11-30

Nguyen, Khanh P.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Mold having movable core or movable pin

425443, B29C 4537

Patent

active

052660222

ABSTRACT:
A brush holder structure in an electric motor in which brush holders for housing brushes held in slidable contact with a commutator provided on a rotor shaft and an end bracket for rotatably supporting the rotor shaft are both integrally molded with a gear frame for housing and supporting a worm gear mechanism. In addition to the main mold for molding the gear frame, two first molds and two U-shaped second molds are abutted so as to form the brush holders when the gear frame is molded. A projection extending from each of the first molds extends between the arms of the associated U-shaped second molds to form a lead-out groove for leading out a pig tail extended from each brush. The lead-out groove is formed in a proximal end side wall of each brush holder with respect to the rotor shaft, and a receiving recess for receiving a resilient element fitted in each brush holder to press each brush against a commutator is disposed between the proximal and distal end side walls of each brush holder as a result of the separation between the projection on the first mold and the base of the associated U-shaped second mold. The receiving recess extends in the axial direction of the rotor shaft, and is set to have its width not exceeding the width of the lead-out groove in the circumferential direction of the rotor shaft. The brush holders having the receiving recess are molded by setting a paired first and second mold in butt relationship against the main mold.

REFERENCES:
patent: 3355772 (1967-12-01), Kolberg
patent: 3908142 (1975-09-01), Gaudry
patent: 4074162 (1978-02-01), Parzych
patent: 4118647 (1978-10-01), Brenner et al.
patent: 4227104 (1980-10-01), Hamman
patent: 4355253 (1982-10-01), Vollbrecht
patent: 4372524 (1983-02-01), Pailler
patent: 4475053 (1984-10-01), Mayer
patent: 4554476 (1985-11-01), Gotoh
patent: 4604256 (1986-08-01), Greenwood et al.
patent: 4677333 (1987-06-01), Auzolat et al.
patent: 4748356 (1988-05-01), Okashiro
patent: 4801833 (1989-01-01), Dye
patent: 4847528 (1989-07-01), Eguchi
patent: 4885948 (1989-12-01), Thrasher et al.
patent: 5015897 (1991-05-01), Inagaki et al.

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