Connecting rod journals and crankshaft spider bearing in an engine
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United States of America Patent
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Mar 8, 2011
Grant Date -
Jan 31, 2008
app pub date -
Jul 17, 2007
filing date -
Sep 14, 2004
priority date (Note) -
Expired
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Abstract
In an engine having a crankshaft driven by reciprocating pistons in an arrangement of cylinders, a spider bearing is fixed to a crankshaft journal that is offset from the central axis of the crankshaft. Each piston is drivingly linked to the spider bearing by a connecting rod. Circular links at the opposite ends of each connecting rod are fitted with an inner bearing ring to provide low friction movement of the ends of each connecting rod relative to the piston and the spider bearing. Hubs equally spaced about the central axis of the spider bearing enable connection of the rod links to the spider bearing. In a preferred embodiment, the spider bearing is formed of a bearing material that surrounds the outer surface of the connecting rod links which, combined with the inner bearing rings, provides a double-backed bearing for carrying the piston load.
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