Railway rolling stock – Trucks – Bogie
Patent
1987-03-23
1988-08-02
Smith, Leonard E.
Railway rolling stock
Trucks
Bogie
1051982, 1051987, B61F 508
Patent
active
047607998
ABSTRACT:
A railway vehicle truck in which the framing consists of sideframes resiliently supported at their ends on the axle bearings and a main frame supported on the sideframes by flat elastomeric pad devices inclined longitudinally of the truck and located at a substantially higher level than the levels of the neutral axes of the sideframe center portions and of the effective lateral reaction points of the resilient supports of the sideframes on the axles, the position and inclination of the pad devices being such that the horizontal component of the resultant force developed by each pad device on the respective sideframe lies along the neutral axis of the sideframe center portion whereby to place the center portion of the sideframe in tension rather than bending and thereby permit use of sideframes of extremely light construction, and separating lateral thrust means between the sideframes and main frame from the vertical springing function of the inclined pad devices to permit optimum placement of the lateral thrust means, i.e., in the region of the effective level of resilient support of the sideframes on the axles, thereby eliminating substantial lateral overturning moments on the sideframes which would otherwise occur if all lateral thrust between the main frame and sideframes were applied at the level of the inclined pads.
REFERENCES:
patent: 3181479 (1965-05-01), Rumsey et al.
patent: 3512482 (1970-05-01), Lich
patent: 3650219 (1972-03-01), Seely
patent: 3799066 (1974-03-01), Jackson
patent: 4428301 (1984-01-01), Jackson
patent: 4429637 (1984-02-01), Jackson et al.
Jackson Keith L.
Polley Richard B.
Schmitt Dallas L.
Burgess F. Travers
GSI Engineering, Inc.
Smith Leonard E.
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