JPS63162951U

JPS63162951U -

Info

Publication number: JPS63162951U
Application number: JP5594287U
Authority: JP
Priority date: 1987-04-15
Filing date: 1987-04-15
Publication date: 1988-10-25

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係る可変圧縮比
機構における偏心ベアリングの回転速度低減機構
の断面図、第２図は第１図の装置において連結棒
がロツクピンに当接した時の状態を示す断面図、
第３図は第１図の装置を別方向からみた断面図、
第４図は第１図の装置における偏心ベアリングと
プレートと連結棒との分解斜視図、第５図は本考
案の第２実施例に係る可変圧縮比機構における偏
心ベアリングの回転速度低減機構の要部断面図、
第６図は本考案の第３実施例に係る可変圧縮比機
構における偏心ベアリングの回転速度低減機構要
部側面図、第７図は本考案の第４実施例に係る可
変圧縮比機構における偏心ベアリングの回転速度
低減機構の要部断面図、第８図は第７図の部分拡
大断面図、第９図は従来の偏心ベアリングによる
可変圧縮比機構の一例を示す断面図、第１０図は
第９図のＸ―Ｘ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、２２……小端孔、２３……偏心ベアリ
ング、２７……ロツクピン、３０……ロツクピン
案内溝、３１……プレート、３２……連結棒、３
３……長穴、３５……突起部、４２，６１……遮
へい板、５１……板ばね。 Fig. 1 is a cross-sectional view of the eccentric bearing rotational speed reduction mechanism in the variable compression ratio mechanism according to the first embodiment of the present invention, and Fig. 2 shows the state of the device shown in Fig. 1 when the connecting rod is in contact with the lock pin. A cross-sectional view showing
Figure 3 is a sectional view of the device in Figure 1 seen from a different direction;
FIG. 4 is an exploded perspective view of the eccentric bearing, plate, and connecting rod in the device shown in FIG. Partial sectional view,
FIG. 6 is a side view of the main part of the rotational speed reduction mechanism of the eccentric bearing in the variable compression ratio mechanism according to the third embodiment of the present invention, and FIG. 7 is the eccentric bearing in the variable compression ratio mechanism according to the fourth embodiment of the present invention. 8 is a partially enlarged sectional view of FIG. 7, FIG. 9 is a sectional view showing an example of a variable compression ratio mechanism using a conventional eccentric bearing, and FIG. FIG. 3 is a cross-sectional view taken along line XX in the figure. 20... Connecting rod, 21... Piston pin, 22... Small end hole, 23... Eccentric bearing, 27... Lock pin, 30... Lock pin guide groove, 31... Plate, 32... Connecting rod, 3
3... Long hole, 35... Projection, 42, 61... Shielding plate, 51... Leaf spring.

Claims

[Scope of utility model registration request]

An eccentric bearing is rotatably interposed between the piston pin and the connecting rod, and a lock pin slidably provided on the connecting rod side is inserted into the lock pin guide groove formed on the outer peripheral surface of the eccentric bearing. In the variable compression ratio mechanism, the eccentric bearing is provided with a plate rotatable about the axis of the piston pin on the side surface of the eccentric bearing, and the plate is provided with a lock pin guide groove of the eccentric bearing. A movable connecting rod is connected by traversing and abutting the locking pin, and on the outer periphery of the plate, when the plate is rotated by movement of the connecting rod, the connecting rod is inserted into the small end hole of the connecting rod. A mechanism for reducing the rotational speed of an eccentric bearing in a variable compression ratio mechanism, characterized by having a protrusion that comes into contact with the peripheral surface.