LOWER LINK IN PISTON CRANK MECHANISM OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To raise a contact pressure of a first division plane 24A on which a load acts to an opening direction.;SOLUTION: A lower link 4 includes: a substantially central crank pin bearing part 21 into which a crank pin is fitted; a pin boss part 22 for an upper pin at one edge; and a pin boss part 23 for a control pin at the other edge. For assembling properties to the crank pin, the structure is divided into a lower link upper 31 and a lower link lower 32 along division planes 24A and 24B passing the center of the crank pin bearing part 21. Both are integrally fastened by two bolts. A recess part 40 is recessed in a side face of the lower link 4, and this recess part 40 is extended ranging from the lower link upper 31 to the lower link lower 32 to cross only the first division plane 24A on the control pin boss part 23 side in which a load acts to a direction of opening the division plane of the first division plane 24A and the second division plane 24B positioned on both the sides of the crank pin bearing part 21.;COPYRIGHT: (C)2012,JPO&INPIT