JPS62162356U

JPS62162356U -

Info

Publication number: JPS62162356U
Application number: JP5082686U
Authority: JP
Priority date: 1986-04-07
Filing date: 1986-04-07
Publication date: 1987-10-15

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例に係る偏心ベアリン
グ用スラストワツシヤ近傍の断面図、第２図は第
１図のスラストワツシヤ自体の平面図、第３図は
第２図のスラストワツシヤの断面図、第４図は本
考案に係る第２図とは別のスラストワツシヤの平
面図、第５図は第４図のスラストワツシヤの断面
図、第６図は従来の偏心ベアリングであつて可変
圧縮比機構に適用された場合の断面図、第７図は
第６図と直角方向のクランクピン近傍の断面図、
第８図は第６図の可変圧縮比機構のシリンダブロ
ツク側の断面図、第９図は第７図および第８図間
の油通路の系統図、である。１……ピストン、１ａ……ピンボス、３……コ
ネクテイングロツド、７……偏心ベアリング、８
……ロツク穴、１０……ロツクピン、２３……ス
ラストワツシヤ、２４……油溝。 Fig. 1 is a sectional view of the vicinity of a thrust washer for an eccentric bearing according to an embodiment of the present invention, Fig. 2 is a plan view of the thrust washer itself shown in Fig. 1, Fig. 3 is a sectional view of the thrust washer shown in Fig. 2, and Fig. 4 The figure is a plan view of a thrust washer different from that shown in Figure 2 according to the present invention, Figure 5 is a sectional view of the thrust washer shown in Figure 4, and Figure 6 is a conventional eccentric bearing applied to a variable compression ratio mechanism. Figure 7 is a cross-sectional view of the vicinity of the crank pin in the direction perpendicular to Figure 6;
8 is a sectional view of the variable compression ratio mechanism of FIG. 6 on the cylinder block side, and FIG. 9 is a system diagram of the oil passage between FIGS. 7 and 8. 1... Piston, 1a... Pin boss, 3... Connecting rod, 7... Eccentric bearing, 8
... Lock hole, 10 ... Lock pin, 23 ... Thrust washer, 24 ... Oil groove.

Claims

[Scope of utility model registration request]

An eccentric bearing whose inner and outer circumferences are eccentric with respect to each other is rotatably interposed between a piston pin extending between opposing pin bosses of the piston and a small end hole of a connecting rod located between the pin bosses,
In a variable compression ratio mechanism for an internal combustion engine that changes the compression ratio by changing the relative position of the piston with respect to the connecting rod through the rotation of the eccentric bearing, a piston pin is connected between the side surface of the eccentric bearing and the pin boss. A thrust washer for eccentric bearings, which is characterized by having a thrust washer interposed therein that can rotate freely.