JPS63168234U

JPS63168234U -

Info

Publication number: JPS63168234U
Application number: JP6129787U
Authority: JP
Priority date: 1987-04-24
Filing date: 1987-04-24
Publication date: 1988-11-01

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る偏心ベアリ
ングのロツク機構におけるロツクピンの断面図、
第２図は第１図の斜視図、第３図は第１図のロツ
クピンを有する偏心ベアリングのロツク機構の断
面図、第４図は本考案の第２実施例に係る偏心ベ
アリングのロツク機構の断面図、第５図は第４図
の変形例を示す断面図、第６図は従来の可変圧縮
比機構の一例を示す断面図、第７図は第６図の
―線に沿う断面図、である。２０……コネクテイングロツド、２１……ピス
トンピン、２３……偏心ベアリング、２６……ロ
ツクピン収納穴、２７……ロツクピン、２８……
ロツクピン係合孔、３１，４２，４３……緩衝部
材。 FIG. 1 is a sectional view of a lock pin in a lock mechanism of an eccentric bearing according to a first embodiment of the present invention;
2 is a perspective view of FIG. 1, FIG. 3 is a cross-sectional view of an eccentric bearing locking mechanism having the lock pin shown in FIG. 1, and FIG. 4 is a locking mechanism of an eccentric bearing according to a second embodiment of the present invention. 5 is a sectional view showing a modification of FIG. 4; FIG. 6 is a sectional view showing an example of a conventional variable compression ratio mechanism; FIG. 7 is a sectional view taken along line - in FIG. 6; It is. 20... Connecting rod, 21... Piston pin, 23... Eccentric bearing, 26... Lock pin storage hole, 27... Lock pin, 28...
Lock pin engagement hole, 31, 42, 43...buffer member.

Claims

[Scope of utility model registration request]

A lock pin in which an eccentric bearing is rotatably interposed between a piston pin and a connecting rod, and a lock pin slidably provided in a lock pin storage hole on the connecting rod side is opened on the outer peripheral surface of the eccentric bearing. In a variable compression ratio mechanism that locks the rotation of an eccentric bearing by engaging with an engagement hole, an impact is applied to at least one of the lock pin and the lock pin storage hole when the lock pin collides with the lock pin storage hole. A locking mechanism for an eccentric bearing, characterized in that it is provided with a buffer member that reduces the