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US 5,333,926 AGranted
Railway wheel
AssigneeAMSTED Industries Incorporated
InventorsC. Dale Christie, Michael T. Gallagher, Michael J. Hendricksen, John D. Oliver, Mark A. Polzin
Life of this patent
Estimating the term…
Abstract
A steel railway wheel with reduced axial flange deflection and reduced, thermally-induced, residual-tensile stress in the wheel rim, has a clearly defined relationship among the plate angle, the maximum depth of curvature of the wheel plate segment, the location of the maximum depth of curvature, the wheel hub and the rim, which relationship is provided for plate segments both concave and convex with respect to the wheel outboard surface.
Claims14
A steel railway wheel providing low axial flange deflection and low, thermally-induced, residual tensile stress effects, said wheel comprising:
- a hub with an axial bore and a longitudinal axis;
- a rim generally concentric with said bore;
- a plate extending generally radially outward from said hub to said rim, said plate having a substantially arcuate cross-section, a first front fillet, a second front fillet, a first rear fillet and a second rear fillet;
- said hub having a hub front face, a hub front corner radius, a hub rear face and a hub rear corner radius,
- said hub front corner radius tangent to said hub front face at a hub front tangent and merging with said front face with one of said plate first and second front fillets,
- said hub rear corner radius tangent to said hub rear face at a hub rear tangent and merging with said hub rear face with one of said plate first and second rear fillets;
- said rim having a rim front face, rim front corner radius, a rim rear face and a rim rear corner radius,
- said rim front corner radius tangent to said rim front face at a rim front tangent and merging with said rim front face with the other of said plate first and second front fillets,
- said rim rear corner radius tangent to said rim rear face at a rim rear tangent and merging with said rim rear face with the other of said plate first and second rear fillets;
- said rim front face tangent and rim rear face tangent defining a midpoint therebetween;
- a first radius extending from said longitudinal axis to said midpoint;
- a radial axis extending from said midpoint in a direction toward said longitudinal axis and angularly displaced from said first radius at an angle of inclination up to ten (10) arc degrees from said first radius toward said hub front face;
- said plate having a plate contour generally concave to said hub front face, a wall thickness and a centerline generally conforming to said plate contour midway through said wall thickness,
- said plate having a maximum depth of curvature at said plate centerline with an offset distance from said radial axis between said hub and said midpoint, which offset distance is between about 1.75 inches (4.45 cm.) and about 2.50 inches (6.35 cm.).
11 more elements
A steel railway wheel providing low axial flange deflection and low, thermally-induced, residual tensile stress effects, said wheel comprising:
- a hub with an axial bore and a longitudinal axis;
- a rim generally concentric with said bore;
- a plate extending generally radially outward from said hub to said rim, said plate having a substantially arcuate cross-section, a first front fillet, a second front fillet, a first rear fillet and a second rear fillet;
- said hub having a hub front face, a hub front corner radius, a hub rear face and a hub rear corner radius,
- said hub front corner radius tangent to said hub front face at a hub front tangent and merging with said front face with one of said plate first and second front fillets,
- said hub rear corner radius tangent to said hub rear face at a hub rear tangent and merging with said hub rear face with one of said plate first and second rear fillets;
- said rim having a rim front face, rim front corner radius, a rim rear face and a rim rear corner radius,
- said rim front corner radius tangent to said rim front face at a rim front tangent and merging with said rim front face with the other of said plate first and second front fillets,
- said rim rear corner radius tangent to said rim rear face at a rim rear tangent and merging with said rim rear face with the other of said plate first and second rear fillets;
- said rim front face tangent and rim rear face tangent defining a midpoint therebetween;
- a first radius extending from said longitudinal axis to said midpoint;
- a radial axis extending from said midpoint in a direction toward said longitudinal axis and angularly displaced from said first radius at an angle of inclination between up to ten (10) arc degrees from said first radius toward said hub front face and five (5) arc degrees toward said rear hub face;
- said plate having a plate contour generally convex to said hub front face, a wall thickness and a centerline generally conforming to said plate contour midway through said wall thickness,
- said plate having a maximum depth of curvature at said plate centerline with an offset distance from said radial axis between said hub and said midpoint, which offset distance is between about 1.95 inches (4.95 cm.) and about 3.25 inches (8.26 cm.).
11 more elements
Dependencies are inferred from the claim text.