Guide frame for eddy current type breaking system
AssigneeIsuzu Motors Limited
InventorTohru Kuwahara
Life of this patent
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Abstract
A guide frame for an eddy current type braking system includes a brake drum connected to a rotary shaft; a stationary pole piece frame formed of a non-magnetic material, disposed within the brake drum and retaining a plurality of ferromagnetic plates opposed to an inner surface of the brake drum; and magnet support rings formed of a magnetic material and retaining permanent magnets opposed to the ferromagnetic plates. An outer surface and an inner peripheral surface of each ferromagnetic plate is displaced in a direction parallel to the axis of the brake drum, and an axial center of the outer peripheral surface of the ferromagnetic plates is substantially radially aligned with an axial center of the brake drum.
Claims18
A vehicle braking system comprising:
- a rotatable brake drum coupled to a rotary shaft and having inner and outer ends and defining an annular inner drum surface;
- pole piece support means disposed adjacent to said brake drum;
- a plurality of annularly spaced apart ferromagnetic pole pieces retained by said pole piece support means, each said pole piece having an outer pole piece surface juxtaposed to said inner drum surface and an oppositely directed inner pole piece surface;
- magnet support means disposed adjacent to said pole piece support means;
- a plurality of annularly spaced apart permanent magnets retained by said magnet support means and juxtaposed to said inner pole piece surfaces;
- adjustment means for producing relative movement between said pole pieces and said permanent magnets;
- and
- said system being characterized whereby said inner pole piece surface of each said pole piece is displaced from said outer pole piece surface thereof in a direction parallel to a rotational axis of said brake drum.
Dependencies are inferred from the claim text.