JPS6243144U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図イは本考案の第１実施例に係る可変圧縮
比機構の油圧通路の断面図、第１図ロは第１図イ
のＡ―Ａ線に沿う断面図、第１図ハは第１図イの
Ｂ―Ｂ線に沿う断面図、第２図は本考案の第２実
施例に係る可変圧縮比機構の油圧通路の断面図、
第３図は従来の可変圧縮比機構の断面図、第４図
イは従来の可変圧縮比機構の第３図とは直角方向
の断面図、第４図ロは第４図イのＣ―Ｃ線に沿う
断面図、である。 ３……コネクテイングロツド、９……ロツクピ
ン、１０，１１……油通路、１３，１４……油溝
、１７，１８……油穴、１９，２２……油通路。 FIG. 1A is a sectional view of the hydraulic passage of the variable compression ratio mechanism according to the first embodiment of the present invention, FIG. 1B is a sectional view taken along line AA in FIG. 1 is a cross-sectional view taken along line B-B in Figure 1A, and Figure 2 is a cross-sectional view of a hydraulic passage of a variable compression ratio mechanism according to a second embodiment of the present invention.
Fig. 3 is a sectional view of a conventional variable compression ratio mechanism, Fig. 4 (a) is a sectional view of the conventional variable compression ratio mechanism in a direction perpendicular to Fig. 3, and Fig. 4 (b) is a cross-sectional view of the conventional variable compression ratio mechanism taken along C-C of Fig. 4 (a). FIG. 3... Connecting rod, 9... Lock pin, 10, 11... Oil passage, 13, 14... Oil groove, 17, 18... Oil hole, 19, 22... Oil passage.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ピストンピンとコネクテイングロツドとの間に
偏心ベアリングを介装して偏心ベアリングの回転
に応じて圧縮比を可変とし、コネクテイングロツ
ドに出入自在に装着したロツクピンを偏心ベアリ
ングに設けた孔に出し入れすることによつて偏心
ベアリングの回転をロツク、アンロツク可能とし
、ロツクピンの駆動をコネクテイングロツド大端
孔の円周部に設けた２つの油溝からコネクテイン
グロツドの大端部と小端部との間にわたつて延び
る２つの油通路に圧油を切換可能に供給して行な
うようにした偏心ベアリングタイプの可変圧縮比
機構において、前記２つの油溝との接続を、それ
ぞれクランクの回転方向前端部にしたことを特徴
とする可変圧縮機構の油圧通路。 An eccentric bearing is inserted between the piston pin and the connecting rod to make the compression ratio variable according to the rotation of the eccentric bearing, and the lock pin, which is attached to the connecting rod so that it can be moved in and out, is inserted into and taken out of the hole provided in the eccentric bearing. By doing so, the rotation of the eccentric bearing can be locked and unlocked, and the lock pin is driven from two oil grooves provided on the circumference of the connecting rod large end hole to the large and small ends of the connecting rod. In an eccentric bearing type variable compression ratio mechanism in which pressurized oil is switchably supplied to two oil passages extending between A hydraulic passage of a variable compression mechanism characterized in that the front end of the hydraulic passage is located at the front end.