Wheel hub assembly with dual rows of rolling elements
AssigneeAktiebolaget Skf
InventorLuca Ciulla
Life of this patent
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Abstract
A wheel hub assembly with two rows of rolling elements has a central axis of rotation and inner raceway and outer raceways for each row of elements, the associated inner and outer raceways being axially displaced in accordance with a respective angle of contact and along a respective load line such that the assembly is capable of accommodating combined loading. The raceways of each row of rolling elements have osculation ratios which are defined by the ratio between the radius of curvature of the raceways and the outside diameters of the rolling elements of the associated row of rolling elements. The osculation ratios of a first one of the two rows of the rolling elements are different than the osculation ratios of a second one of the two rows of the rolling elements.
Claims12
A wheel hub assembly comprising:
- first and second inner raceways disposed about a central axis of rotation, each one of the first and second inner raceways having a radius of curvature;
- a first row of rolling elements disposed on the first inner raceway and a second row of rolling elements disposed on the second inner raceway, each rolling element of the first row having a first outside diameter and each rolling element of the second row of rolling elements having a second outside diameter that is equal to the first outside diameter;
- and
- first and second outer raceways each having a radius of curvature, the first outer raceway being disposed generally about and axially spaced from the first inner raceway such that a first load line through the first row of rolling elements defines a first angle of contact with respect to the central axis, and the second outer raceway being disposed generally about and axially spaced from the second inner raceway such that a second load line through the second row of rolling elements defines a second angle of contact with respect to the central axis;
- and
- wherein the first row of rolling elements has an osculation ratio defined between the first outer raceway radius of curvature and the first rolling element outside diameter and another osculation ratio defined between the first inner raceway radius of curvature and the first outside diameter, the second row of rolling elements has an osculation ratio defined between the second outer raceway radius of curvature and the second rolling element outside diameter and another osculation ratio defined between the second inner raceway radius of curvature and the second outside diameter, and each of the two osculation ratios of the first row of rolling elements has a value different than the value of the corresponding osculation ratio of the second row of rolling elements.
Dependencies are inferred from the claim text.