SUPPORT STRUCTURE FOR CRANK SHAFT Russian patent published in 2011 - IPC F02F7/00 F16C35/02 

FIELD: machine building.

SUBSTANCE: support structure (1) for crank shaft (6) consists of lower section (2) of cylinder block (19) and bearing cover (3). Bearing cover (3) is located under lower section (2) of the block and has grooves (15, 16) for relaxation of stresses. Grooves (15, 16) are made in upper sections of opposite sides (3c, 3b) of bearing cover (3). Grooves (15, 16) pass along axis of the crank shaft and are open of opposite side surfaces of the bearing cover. Projecting ends (11, 12) are made in upper sections of the bearing cover by forming grooves (15, 16). Ends (11, 12) are flexibly bent under load to the bearing cover at rotation of the crank shaft. In the invention there is also disclosed support structure (1) for crank shaft (6), whereat in upper sections of opposite sides (3c, 3b) of bearing cover there are made lugs (17, 18). Lugs (17, 18) pass along axis of the crank shaft and project from surface of the cover in the direction from crank shaft (6). The lugs have upper surface (48), remote surface (49) and lower surface (50). Upper surface (48) contacts lower section of the cylinder block (2). Lower surface (50) has inclined surface (39) and arc-shaped surface (41).

EFFECT: support structure of crank shaft preventing cracks in lower section of cylinder block.

8 cl, 12 dwg