JPS63110652U

JPS63110652U -

Info

Publication number: JPS63110652U
Application number: JP275487U
Authority: JP
Priority date: 1987-01-12
Filing date: 1987-01-12
Publication date: 1988-07-15

Description

[Brief explanation of the drawing]

第１図〜第６図は本考案の第１実施例に係るエ
ンジンのピストン装置を示す縦断面図であり、第
１図は圧力リングおよびオイル通路の具体的構造
を拡大して示す要部縦断面図、第２図は第１図に
示す圧力リングおよびオイル通路を備えたピスト
ン装置を適用したエンジンの要部縦断面図、第３
図および第４図はインナーリングの自由状態にお
ける形状を示す図であり、第３図はインナーリン
グの平面図、第４図はインナーリングの正面図、
第５図および第６図はリング溝内における圧力リ
ングの挙動を示す図であり、第５図は圧力リング
が溝下面およびリング溝底面に密着した状態を示
す図、第６図は圧力リングがリング溝上面および
リング溝底面に密着した状態を示す図、第７図は
本考案の第２実施例に係るエンジンのピストン装
置の要部を示す縦断面図、第８図は本考案の第３
実施例に係るエンジンのピストン装置を２サイク
ルエンジンに適用した要部縦断面図である。１０，１２，１３……圧力リング、２０，２２
，２３……アウターリング、２５……アウターリ
ング背面、３０，３２，３３……インナーリング
、３５……インナーリング内周面、３６……イン
ナーリング上面、３７……インナーリング下面、
４０，４２，４３……環状溝、４６……環状溝上
面、４７……環状溝下面、５０，５２，５３……
オイル通路、６０，６２，６３……シリンダボア
、７０，７２，７３……ピストン、７５……ピス
トン内部、９０，９２，９３……リング溝、９５
……リング溝底面。 1 to 6 are longitudinal cross-sectional views showing a piston device for an engine according to a first embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of main parts showing an enlarged view of the specific structure of a pressure ring and an oil passage. 2 is a longitudinal sectional view of the main part of the engine to which the piston device equipped with the pressure ring and oil passage shown in FIG.
4 and 4 are diagrams showing the shape of the inner ring in a free state, FIG. 3 is a plan view of the inner ring, FIG. 4 is a front view of the inner ring,
Figures 5 and 6 are diagrams showing the behavior of the pressure ring within the ring groove. Figure 5 shows the pressure ring in close contact with the lower surface of the groove and the bottom of the ring groove, and Figure 6 shows the pressure ring FIG. 7 is a vertical sectional view showing the main parts of the engine piston device according to the second embodiment of the present invention, and FIG. 8 is the third embodiment of the present invention.
FIG. 2 is a vertical cross-sectional view of a main part of an engine piston device according to an embodiment applied to a two-stroke engine. 10, 12, 13...pressure ring, 20, 22
, 23... Outer ring, 25... Outer ring back surface, 30, 32, 33... Inner ring, 35... Inner ring inner peripheral surface, 36... Inner ring top surface, 37... Inner ring bottom surface,
40, 42, 43... annular groove, 46... annular groove upper surface, 47... annular groove lower surface, 50, 52, 53...
Oil passage, 60, 62, 63... Cylinder bore, 70, 72, 73... Piston, 75... Piston interior, 90, 92, 93... Ring groove, 95
...The bottom of the ring groove.

Claims

[Claim for Utility Model Registration] In an engine piston device assembled by fitting a pressure ring consisting of an outer ring and an inner ring into a ring groove formed in a piston, A groove is formed, and an inner ring with a rectangular cross section whose upper and lower surfaces are parallel to the upper and lower surfaces of the annular groove when assembled is inserted into this annular groove, so that the inner circumferential surface of the inner ring can slide on the bottom surface of the ring groove. A pinton device for an engine, characterized in that the ring groove is brought into close contact with the inside of the piston, and an oil passage is bored to communicate between the ring groove and the inside of the piston.