US 4,018,311 AGranted

Rotor and braking ring disc assembly

AssigneeGirling Limited

InventorColin John Frederick Tickle

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Abstract

In a railway disc brake, a plurality of arcuate elements or segments of a braking ring are attached to the rotor so that each element or segment can thermally expand and contract relative to the rotor, and pairs of circumferentially spaced locating abutments are provided for preventing radial inward and outward movement of the element or segment relative to the rotor at predetermined locations which are selected so that when the element undergoes thermal expansion or contraction with respect to the rotor there is no movement of the element into or out of engagement with the abutments. The abutments may take the form of radial projections on the element or segment or rotor, which projections are urged into engagement with a groove in the rotor or disc element, respectively by further abutments, such as in the form of camming wedges or springs. Alternatively the abutments may be lateral projections on the rotor which are a sliding fit in elongated grooves in the element or segment.

Claims11

Dependent claims

A railway disc brake assembly comprising a rotor, a braking ring comprising a plurality of arcuate segments, and means attaching said ring to said rotor in a manner permitting thermal expansion and contradiction of said ring relative to said rotor, said attaching means including anchor means for preventing circumferential movement of said ring relative to said rotor and first and second pairs of circumferentially spaced abutment means on said rotor for each of said segments engaging each of said segments only at first and second pairs of circumferentially spaced locations so as to prevent radially outward and inward movement of each of said segments relative to said rotor at said locations, the first and second circumferentially spaced locations being selected so that said abutment means engage each of said segments at those circumferentially spaced positions thereof having substantially no movement relative to said rotor when said segement undergoes thermal expansion or contraction relative to said rotor whereby there is substantially no movement by said segment into or out of engagement with said abutment means when said segment undergoes said thermal expansion or contraction.

Dependencies are inferred from the claim text.