Crank-drive with bearings having micro-ramp structures of asymmetric form

• Main Authors: CARDOSO,RICARDO SANTORO, DUARTE,DURVAL, SALLES,BRUNO BARBOSA DE OLIVEIRA FERREIRA
• Format: Patent
• Language: English; French; German
• Published: 01.06.2016
• Subjects: BEARINGS; BLASTING; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS

The present invention relates to a crank-drive (1) with a crank-shaft (10), at least one connecting rod (11) and at least one piston (12), in particular a crank-drive (1) of an internal combustion engine, whereas the crank-shaft (10) features at least one radial bearing (13) for supporting the crank-shaft (10) in a crank-housing (14), at least one radial bearing (15) for connecting the connecting rod (11) to the crank-shaft (10), and the connection of the connecting rod (11) to the piston (12) features at least one radial bearing (16) and whereas the bearings (13, 15, 16) feature a bearing inner surface (17) and/or a bearing outer surface (18). According to the invention in at least one of the bearing surfaces (17, 18) are arranged micro-ramp structures (19) with an asymmetric form having a first concave section (20) between the bearing surface (17, 18) and a bottom point (21) of the micro-ramp structure (19) and a second concave section (22) between the bottom point (21) and the bearing surface (17, 18), whereas between the micro-ramp structures (19) are arranged sections of the bearing surface (17, 18).