JPH0377048U

JPH0377048U -

Info

Publication number: JPH0377048U
Application number: JP13796989U
Authority: JP
Priority date: 1989-11-30
Filing date: 1989-11-30
Publication date: 1991-08-01

Description

[Brief explanation of drawings]

第１図は本考案を採用したエンジンの一実施例
を示す部分縦断面図であり、第２図は第１図中Ａ
−Ａ断面図である。第３図は偏心ベアリングの斜
視図である。第４図ａ，ｂ，ｃと第５図ａ，ｂ，
ｃは共に実施例における作動を示す説明図である
。図中、１……クランクシヤフト、２……クラン
クジヤーナル、３……クランクピン、８……メイ
ンギヤラリ、９，１０……油穴、１１……油通路
、１２……偏心ベアリング、１３……コンロツド
、１４……大端部、１５……コンロツドキヤツプ
、１８……第１ロツク穴、１９……第２ロツクピ
ン、２０……ピン穴、２１……第１ロツクピン、
２２……リターンスプリング、２３……第２ロツ
ク穴、２４……作動ピン、２５……リターンスプ
リングである。 FIG. 1 is a partial vertical sectional view showing an embodiment of an engine adopting the present invention, and FIG.
-A sectional view. FIG. 3 is a perspective view of the eccentric bearing. Figure 4 a, b, c and Figure 5 a, b,
FIG. 3c is an explanatory diagram showing the operation in the embodiment. In the figure, 1... Crankshaft, 2... Crank journal, 3... Crank pin, 8... Main gear lary, 9, 10... Oil hole, 11... Oil passage, 12... Eccentric bearing, 13... Conn rod, 14... Big end, 15... Conn rod cap, 18... First lock hole, 19... Second lock pin, 20... Pin hole, 21... First lock pin,
22...return spring, 23...second lock hole, 24...operating pin, 25...return spring.

Claims

[Claims for Utility Model Registration] The connecting rod is interposed between the large end of the connecting rod and the crank pin of the crankshaft, and the outer diameter side that fits into the large end and the inner diameter side that fits into the crank pin are mutually connected. an eccentric bearing built in the large end portion and fitted into a first lock hole formed in the eccentric bearing by being biased by a biasing means to integrate the connecting rod and the eccentric bearing; , a first lock pin that becomes flush with the inner surface of the large end when a full stroke is made by input from the eccentric bearing side; and a first lock pin formed within the crank pin to direct engine oil pressure from the main gear rally to the eccentric bearing. It is built in an oil passage for supplying the oil and a first lock hole of the eccentric bearing, and a first set oil pressure from the oil passage allows the first lock pin to enter the first lock hole, while a second set oil pressure allows the first lock pin to enter the first lock hole. The first lock pin is pressed to release the fitting with the first lock hole, and the large end is fitted into a second lock hole formed on the opposite side of the first lock pin to connect the connecting rod and the eccentric bearing. a second lock pin integrated into the second lock hole; and a second lock pin built in the second lock hole, which allows the second lock pin to enter the second lock hole at the second hydraulic pressure setting, while biasing the second lock pin at the first hydraulic pressure setting. A variable compression ratio engine comprising: an operating pin that presses the second lock pin to release the fitting with the second lock hole and is flush with the inner surface of the large end.