JPS6231746U

JPS6231746U -

Info

Publication number: JPS6231746U
Application number: JP12263085U
Authority: JP
Priority date: 1985-08-12
Filing date: 1985-08-12
Publication date: 1987-02-25

Description

[Brief explanation of the drawing]

第１図は本考案の第１実施例に係るロツクピン
ロツク機構の縦断面図、第２図は第１図の―
線に沿う横断面図、第３図は第１図の―線に
沿う縦断面図、第４図は第１図の―線に沿う
縦断面図、第５図は第１図のロツクキーの拡大斜
視図、第６図は第１図の装置の第１図とは反対側
からみた縦断面図、第７図は第６図の装置の高圧
縮比時の状態を示す縦断面図、第８図は本考案の
第２実施例に係るロツクピンロツク機構の横断面
図、第９図は本考案の第３実施例に係るロツクピ
ンロツク機構の縦断面図、第１０図は従来の偏心
ベアリング、ロツクピンを用いた可変圧縮比機構
の縦断面図、第１１図は第１０図の装置を直角方
向からみた縦断面図、である。２０…コネクテイングロツド、２１，４２，５
６…ロツクピン、２２，４１，５１…ロツクピン
収納孔、２３，５２…ロツクピンロツク用油圧通
路、２４，５４…ロツクピンアンロツク用油圧通
路、２５，４０，５０…ロツクキー、２６…可動
室、２７…切欠部、２８，４４…ばね、４３，５
３，５５…油圧通路。 FIG. 1 is a vertical sectional view of a lock pin lock mechanism according to a first embodiment of the present invention, and FIG.
Figure 3 is a longitudinal cross-sectional view along line - in Figure 1, Figure 4 is a longitudinal cross-sectional view along line - in Figure 1, Figure 5 is an enlarged view of the lock key in Figure 1. 6 is a vertical cross-sectional view of the device shown in FIG. 1 seen from the side opposite to that shown in FIG. 1; FIG. 7 is a vertical cross-sectional view showing the device shown in FIG. The figure is a cross-sectional view of a lock pin lock mechanism according to a second embodiment of the present invention, FIG. 9 is a longitudinal cross-sectional view of a lock pin lock mechanism according to a third embodiment of the present invention, and FIG. 10 is a cross-sectional view of a lock pin lock mechanism according to a third embodiment of the present invention. FIG. 11 is a vertical cross-sectional view of the variable compression ratio mechanism as seen from the right angle direction. 20... Connecting rod, 21, 42, 5
6... Lock pin, 22, 41, 51... Lock pin storage hole, 23, 52... Hydraulic passage for lock pin locking, 24, 54... Hydraulic passage for lock pin unlocking, 25, 40, 50... Lock key, 26... Movable chamber, 27... Notch Part, 28, 44... Spring, 43, 5
3,55...Hydraulic passage.

Claims

[Scope of Claim for Utility Model Registration] (1) An eccentric bearing is interposed between the inner circumference of the small end of the connecting rod and the outer circumference of the piston pin, the inner circumference and outer circumference of which are eccentric from each other, In a variable compression ratio mechanism for an internal combustion engine, a locking pin is provided in the connecting rod to the eccentric bearing side by hydraulic pressure, and this locking pin fixes or frees rotation of the eccentric bearing with respect to the connecting rod. A lock pin locking mechanism characterized in that a lock key is provided inside a bearing rod and is movable between a position for locking the lock pin and a position for releasing the lock when the lock pin moves toward the eccentric bearing. (2) The lock pin lock mechanism according to claim 1, wherein the direction of movement of the lock key is perpendicular to the direction of movement of the lock pin. (3) A practical device in which the lock key is moved to a position where the lock pin is locked by hydraulic pressure that moves the lock pin in the direction of the eccentric bearing, and moved to a position where the lock is released by a spring. A lock pin lock mechanism according to claim 1 of the patent registration claim. (4) The lock key is moved to a position where it locks the lock pin by hydraulic pressure that moves the lock pin toward the eccentric bearing, and is released from the lock by hydraulic pressure that moves the lock pin toward the eccentric bearing. 1. A lock pin lock mechanism according to claim 1, which comprises a mechanism that is moved to a position where the lock pin is moved.