Patent ID: 6328545
Filing Date: 2001-12-11
Classification: F01C,F04C

Abstract:
A crankshaft assembly for a scroll compressor, such scroll compressor including a housing, a stationary scroll element mounted within such housing substantially stationary with respect to such housing, such stationary scroll element including a stationary spiral flange, an orbiting scroll element disposed within such housing, such orbiting scroll element including an orbiting spiral flange, such stationary and orbiting spiral flanges being intermeshed and nested with one another to define a spiraling compression pocket therebetween, each of such stationary and orbiting scroll elements having a central axis, and an orbital drive mechanism for driving such central axis of such orbiting scroll element in an orbit about such central axis of such stationary scroll element while maintaining such orbiting scroll element substantially non-rotational with respect to such stationary scroll element, said crankshaft assembly being for the driving of such orbiting scroll element in such orbit about such stationary scroll element and comprising:a crankshaft member, said crankshaft member having a elongated shaft portion for rotation about a central axis of rotation thereof;a recessed cup portion disposed substantially on a first distal end of said crankshaft member;a lubricating channel extending from said recessed cup portion disposed substantially on said first distal end of said crankshaft member to a lubricating port disposed substantially on a second distal end of said crankshaft member opposite said first distal end of said crankshaft member; andan orbiting rotational bearing disposed substantially within said recessed cup portion, said orbiting rotational bearing having a center of rotation which is radially offset with respect to said central axis of rotation of said crankshaft member;said orbiting rotational bearing being adapted to accept and rotationally engage a hub portion projecting from such orbiting scroll element;said recessed cup portion including a bottom surface, said lubricating channel connecting substantially to said bottom surface of said recessed cup portion;said recessed cup portion being provided with an at least partially annular ledge spaced from said bottom surface; andsaid orbiting rotational bearing engaging said at least partially annular ledge spaced from said bottom surface to define a lubrication reservoir substantially between said bottom surface of said recessed cup portion and said orbiting rotational bearing.