Permanent magnet DC motor and magnet retention clip

Details Permanent magnet DC motor and magnet retention clip Permanent magnet DC motor and magnet retention clip

1998-01-20

1999-09-28

LaBalle, Clayton

Electrical generator or motor structure

Dynamoelectric

Rotary

310218, H02K 2126, H02K 118

Patent

active

059593865

ABSTRACT:
A plurality of retention clips are employed in a DC motor for holding permanent magnets at spaced apart positions in the housing against its annular side wall. The DC motor is of the type having a housing formed by end walls secured to the annular side wall by attaching rods which extend between the end walls inside the annular side wall and are located radially outward of the armature. Each of the retention clips is formed by a thin spring member having two spaced apart clip ends for engaging adjacent ends of two permanent magnets with the spring member extending from one of the clip ends to the other of the clip ends to successively form a first outwardly extending partially open loop, an intermediate inwardly extending partially open loop, and a second outwardly extending partially open loop with the first and second partially open loops having entrances on an inner side of the spring member and the intermediate partially open loop having an entrance on an outer side opposite the inner side. The intermediate partially open loop has an opening for receiving a connecting rod and a neck near the outer side for engaging the connecting rod for preventing radial and angular movement of the spring clip and hence of the adjacent ends of the permanent magnets in the housing.

REFERENCES:
patent: 3258622 (1966-06-01), Gillespie
patent: 4412145 (1983-10-01), Voss et al.
patent: 4445060 (1984-04-01), Ruhle et al.
patent: 4453097 (1984-06-01), Lordo
patent: 4580072 (1986-04-01), Morishita
patent: 4851727 (1989-07-01), Tanaka
patent: 5619084 (1997-04-01), Lan
patent: 5763974 (1998-06-01), Vacca

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