JPS6352930U - - Google Patents
Info
- Publication number
- JPS6352930U JPS6352930U JP14587086U JP14587086U JPS6352930U JP S6352930 U JPS6352930 U JP S6352930U JP 14587086 U JP14587086 U JP 14587086U JP 14587086 U JP14587086 U JP 14587086U JP S6352930 U JPS6352930 U JP S6352930U
- Authority
- JP
- Japan
- Prior art keywords
- eccentric bearing
- lock pin
- engagement hole
- locking
- compression ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 3
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Description
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ロツク機構の断面
図、第２図は第１図における偏心ベアリングの底
面図、第３図のイないしハは第１図における偏心
ベアリングがロツクされる作動順序を示した断面
図、第４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ロツク機構の断
面図、第５図は第４図における偏心ベアリングの
底面図、第６図は第５図における偏心ベアリング
がロツクされる直前の状態を示した断面図、第７
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ロツク機構の断面図、第
８図は第７図における偏心ベアリングの底面図、
第９図は第７図における偏心ベアリングがロツク
される直前の状態を示した断面図、第１０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
偏心ベアリングのロツク機構の断面図、第１１図
は第１０図における偏心ベアリングの底面図、第
１２図のイないしハは第１０図における偏心ベア
リングがロツクされる作動順序を示した断面図、
第１３図は本考案の第５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ロツク機構の断面
図、第１４図は第１３図における偏心ベアリング
の底面図、第１５図のイないしハは第１３図にお
ける偏心ベアリングがロツクされる作動順序を示
した断面図、第１６図は従来の可変圧縮比機構の
断面図、第１７図は第１６図の―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、２３……偏心ベアリング、２７，４１
，５１……ロツクピン、２７ａ，４１ａ，５１ａ
……ロツクピンの先端部外周面、２８，４２，５
２……ロツクピン係合孔、３１，４３，５３，６
１，７１……衝突壁、Ａ……偏心ベアリングの回
転方向。
FIG. 1 is a sectional view of the locking mechanism of the eccentric bearing in the variable compression ratio mechanism according to the first embodiment of the present invention, FIG. 2 is a bottom view of the eccentric bearing in FIG. 1, and A to C in FIG. 1 is a cross-sectional view showing the operating sequence in which the eccentric bearing is locked, FIG. 4 is a cross-sectional view of the eccentric bearing locking mechanism in the variable compression ratio mechanism according to the second embodiment of the present invention, and FIG. Figure 6 is a bottom view of the eccentric bearing in Figure 6. Figure 6 is a sectional view showing the eccentric bearing in Figure 5 just before it is locked.
The figure is a sectional view of the locking mechanism of the eccentric bearing in the variable compression ratio mechanism according to the third embodiment of the present invention, and FIG. 8 is a bottom view of the eccentric bearing in FIG. 7.
9 is a cross-sectional view showing the eccentric bearing in FIG. 7 in a state immediately before it is locked; FIG. 10 is a cross-sectional view of the eccentric bearing locking mechanism in the variable compression ratio mechanism according to the fourth embodiment of the present invention; 11 is a bottom view of the eccentric bearing in FIG. 10, and FIGS. 12A to 12C are cross-sectional views showing the operating sequence in which the eccentric bearing in FIG.
FIG. 13 is a sectional view of the locking mechanism of the eccentric bearing in the variable compression ratio mechanism according to the fifth embodiment of the present invention, FIG. 14 is a bottom view of the eccentric bearing in FIG. 13, and A to C in FIG. FIG. 13 is a cross-sectional view showing the operating sequence in which the eccentric bearing is locked, FIG. 16 is a cross-sectional view of a conventional variable compression ratio mechanism, and FIG. 17 is a cross-sectional view taken along the line -- in FIG. 16. 20... Connecting rod, 21... Piston pin, 23... Eccentric bearing, 27, 41
, 51...Lock pin, 27a, 41a, 51a
...Outer peripheral surface of the tip of the lock pin, 28, 42, 5
2...Lock pin engagement hole, 31, 43, 53, 6
1,71... Collision wall, A... Rotation direction of eccentric bearing.
Claims (1)
間に偏心ベアリングを回転可能に介装し、該偏心
ベアリングにロツクピン係合孔を形成するととも
に該ロツクピン係合孔に嵌合可能なロツクピンを
前記コネクテイングロツドに摺動自在に設け、前
記コネクテイングロツドに前記ロツクピンを駆動
させるための油圧通路を形成した可変圧縮比機構
における偏心ベアリングのロツク機構において、
前記偏心ベアリングがロツクされる際の前記ロツ
クピンの先端部外周面に衝突するロツクピン係合
孔の衝突壁を、ロツクピン係合孔よりも偏心ベア
リングの回転方向に対して進み側に設けたことを
特徴とする可変圧縮比機構における偏心ベアリン
グのロツク機構。 (2) 前記衝突壁の壁面形状を、前記ロツクピン
の先端部外周面と同一形状に形成した実用新案登
録請求の範囲第１項記載の可変圧縮比機構におけ
る偏心ベアリングのロツク機構。[Claims for Utility Model Registration] (1) An eccentric bearing is rotatably interposed between a piston pin and a connecting rod, a lock pin engagement hole is formed in the eccentric bearing, and the eccentric bearing is fitted into the lock pin engagement hole. In a locking mechanism for an eccentric bearing in a variable compression ratio mechanism, a locking pin that can be fitted together is slidably provided on the connecting rod, and a hydraulic passage for driving the locking pin is formed in the connecting rod,
A collision wall of the lock pin engagement hole that collides with the outer peripheral surface of the tip end of the lock pin when the eccentric bearing is locked is provided on the advancing side of the lock pin engagement hole with respect to the rotational direction of the eccentric bearing. A locking mechanism for eccentric bearings in a variable compression ratio mechanism. (2) A locking mechanism for an eccentric bearing in a variable compression ratio mechanism according to claim 1, wherein the collision wall has the same shape as the outer peripheral surface of the tip of the locking pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14587086U JPH048272Y2 (en) | 1986-09-25 | 1986-09-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14587086U JPH048272Y2 (en) | 1986-09-25 | 1986-09-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6352930U true JPS6352930U (en) | 1988-04-09 |
| JPH048272Y2 JPH048272Y2 (en) | 1992-03-03 |
Family
ID=31057799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14587086U Expired JPH048272Y2 (en) | 1986-09-25 | 1986-09-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH048272Y2 (en) |
-
1986
- 1986-09-25 JP JP14587086U patent/JPH048272Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH048272Y2 (en) | 1992-03-03 |