To shorten axial dimensions of a first connection pin and a bearing hole by surely forming an oil film of a bearing surface and preventing seizure of the first connection pin and excess abrasion.
A lower link 13 and an upper link 11 constituting a double link type piston-crank mechanism are oscillatably connected by the first connection pin 12. The first connection pin 12 has a simple cylindrical face, and rotatably fitted to a pin bearing hole 27 of the upper link 11 and a pair of pin bearing holes 24 of the lower link 13. The first connection pin 12 has axial eccentric holes 28 on both end parts, and its center of gravity is eccentric from the center. Accordingly, when a position of the first connection pin 12 itself is moved along an oval movement locus, angular moment is generated, the first connection pin 12 rotates in the bearing holes, and the oil film is formed by wedge effect.
USHIJIMA KENJI
MOGI KATSUYA
TAKAHASHI NAOKI
| JPH06101759A | 1994-04-12 | |||
| JP2003322056A | 2003-11-14 | |||
| JP2004245301A | 2004-09-02 | |||
| JP2002295600A | 2002-10-09 | |||
| JP2005226721A | 2005-08-25 | |||
| JPS63111343A | 1988-05-16 | |||
| JP2004124775A | 2004-04-22 |
Hiromichi Kobayashi
Tomioka Kiyoshi
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