Permanent magnet assembly

Details Permanent magnet assembly Permanent magnet assembly

1994-08-04

1995-08-29

Hill, Mitchell J.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

180142, 180149, B62D 508

Patent

active

054452406

ABSTRACT:
A permanent magnet assembly for an electromagnetic mechanism in a motor vehicle power steering gear includes a metal ring having a plurality of radially oriented permanent magnets defined thereon and a plastic retaining hub attached to the metal ring. The metal ring has an annular end wall, an internal annular shoulder facing the opposite direction from the end wall, and a plurality of V-shaped notches in the end wall. Each V-shaped notch has a pair of flat sides converging at a linear junction tipped back from the plane of the annular end wall. A plastic retaining hub is formed by injection molding plastic in a mold cavity to which the end wall of the metal ring is exposed so that, upon curing of the injection molded plastic, the end wall of the metal ring is seated against an annular side of a socket in a rim of the retaining hub, integral V-shaped lugs on the retaining hub protrude into the V-shaped notches, and a lip of the retaining hub closes behind the internal annular shoulder. Dimensional shrinkage of the plastic retaining hub during curing effects a frictional driving connection between the metal ring and the plastic retaining hub and wedges the V-shaped lugs into the V-shaped notches.

REFERENCES:
patent: 5119898 (1992-06-01), Eckhardt et al.

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