Crank-drive with bearings having micro-ramp structures of asymmetric form
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United States of America Patent
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Jul 17, 2018
Grant Date -
Jul 23, 2015
app pub date -
Jul 2, 2013
filing date -
Jul 6, 2012
priority date (Note) -
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Abstract
The present invention relates to a crank-drive with a crank-shaft, at least one connecting rod and at least one piston, in particular a crank-drive of an internal combustion engine, whereas the crank-shaft features at least one radial bearing (13) for supporting the crank-shaft in a crank-housing, at least one radial bearing for connecting the connecting rod to the crank-shaft, and the connection of the connecting rod to the piston features at least one radial bearing and whereas the bearings feature a bearing inner surface and/or a bearing outer surface. According to the invention in at least one of the bearing surfaces are arranged micro-ramp structures with an asymmetric form having a first concave section between the bearing surface and a bottom point of the micro-ramp structure and a second concave section between the bottom point and the bearing surface, whereas between the micro-ramp structures are arranged sections of the bearing surface.
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