Through the piston pin to the upper connect by pins structural null piston of multi-

摘要

PROBLEM TO BE SOLVED: To reduce the inertia force and the weight of an upper pin connection portion of a double-link piston-crank mechanism.;SOLUTION: The upper link 6 and the lower link 9 of the double-link piston-crank mechanism are connected to each other through an upper pin 7. An upper side pin boss part 21 in which an upper side pin hole 22 in which the upper pin 7 is rotatably loosely fitted is formed on the upper link 6. A lower side pin boss part 23 which is so formed in a fork shape as to sandwich the upper side pin boss part 21 from both sides and in which two lower side pin holes 26, 27 allowing the upper pin 7 to be press-fitted and fixed therein are formed is formed on the lower link 9.;COPYRIGHT: (C)2009,JPO&INPIT