Railway rolling stock – Trucks – Bogie
Patent
1979-07-02
1981-05-05
Reese, Randolph A.
Railway rolling stock
Trucks
Bogie
105182R, 105197DB, 105197DP, 267 9A, 267 9C, B61D 506, B61D 510, B61D 512, B61D 552
Patent
active
042651824
ABSTRACT:
In a railway car truck a lower transom extends between transversely spaced side frames. The side frames include depressed portions having transversely aligned vertical openings or slots which receive spring groups. A bolster including a center connection extends between the side frames above the transom and rests on the spring groups. The side frames each include a hollow post extending upwardly between the spring groups. The bolster includes a depending post which surrounds the side frame post. A friction damping assembly including upper and lower wedges is located within the side frame post and the bolster post. The upper and lower wedges include rear wear plates which engage the side frame post. The upper and lower wedges include an opening to receive a spring extending upwardly from the side frame depressed portion. The lower wedge has at least one inclined surface which slidingly engages at least one inclined surface on the upper wedge. The upper surface of the upper wedge engages the lower surface of the bolster. Oscillations of the spring group and bolster are damped by the rear wear surfaces forced outwardly by the inclines of the upper and lower wedges as the bolster moves downwardly with respect to the side frames.
REFERENCES:
patent: 2118006 (1938-05-01), Couch
patent: 2398621 (1946-04-01), Cottrell
patent: 2403352 (1946-07-01), Edstrom
patent: 2793029 (1957-05-01), Shafer
patent: 2928358 (1920-03-01), Meyer
patent: 3006290 (1961-10-01), Seelig, Jr.
patent: 3762694 (1973-10-01), MacDonnell
patent: 4030424 (1977-06-01), Garner et al.
patent: 4077496 (1978-03-01), Wiebe
Hillstead David P.
Neff Robert K.
ACF Industries Inc.
Beltran Howard
Cummings Henry W.
Reese Randolph A.
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