The reliability of trucks depends to a very great extent on the front and rear hub bearing arrangements. Presently the most common solution for these commercial vehicles is the application of two single-row tapered roller bearings adjusted to a certain clearance. A new advanced Unit Concept offers economical improvements and technical advantages by the drastic reduction of the number of components, simplification of wheel bearing assembly, facilitation of service and brake inspection, as well as increased reliability of the bearing arrangement. Truck Hub Units are double-row tapered roller bearings with separate cones held together by a retention ring and assembled in a one-piece outer ring. The design of Truck Hub Units with integral flanges on the outer rings mainly for non-driven front wheel applications are a further logical step of development. The flanged solution incorporates the function of the wheel hubs for centering the wheels and brake drums. Because of the reduced distance between the pressure or loading centers of the equally-sized Unit cones compared to previous conventional arrangements, specially developed roller track profiles are used to guarantee high bearing life even under the severe misalignment conditions caused during heavy cornering. In order to avoid any risk of inaccurate setting during mounting, the required mounted axial clearance is predetermined for a specific application. FEM calculations are applied to optimize the strength and weight of the Truck Hub Units with integral flanges.
Truck hub units - a new concept for wheel bearing arrangements
Neue Naben fuer Lastwagen - ein Konzept fuer Radlagerung
SAE-Papers ; Nov ; 1-12
1986
12 Seiten, 21 Bilder, 1 Tabelle, 11 Quellen
Aufsatz (Konferenz)
Englisch
Truck Hub Units - A New Concept for Wheel Bearing Arrangements
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