| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a crank structure of a reciprocating internal combustion engine reducing a power transmitting loss to enhance an efficiency. <P>SOLUTION: The crank structure has crank pin center members 21 fixed to a crank shaft 12 and coupling distal end parts of a pair of first crank arms 14, and sliding crank pin members 23 which are fixed to the vicinities of the distal ends of the second crank arms 20 which engage the pair of eccentric cams 18 fixed to fixed members such that virtual center points are decentered to a rotational shaft center, which are arranged such that the distal end parts cause extending sliding movement along the first crank arms, in which long holes for passing through the crank pin center members are formed. Large end parts of connecting rods 24 are surrounded and connected so as to be able to slidingly move on the peripheral part of the sliding crank pin members eccentrically rotating and moving around the crank shaft according to the synthesized eccentric locus synthesized by a right circular locus with the rotation movement of the first crank arms around the rotary shaft and an eccentric circular locus formed by the second crank arms rotating around the virtual center point. <P>COPYRIGHT: (C)2013,JPO&INPIT |
