JPS6415751U

JPS6415751U -

Info

Publication number: JPS6415751U
Application number: JP10950387U
Authority: JP
Priority date: 1987-07-16
Filing date: 1987-07-16
Publication date: 1989-01-26

Description

[Brief explanation of drawings]

第１図ないし第３図は本考案の実施例を示し、
第１図はエンジンのシリンダ部での縦断正面図、
第２図は第１図の―線における断面図、第３
図は第２図の―線における断面図である。ま
た、第４図および第５図は従来例を示し、第４図
は第１図相当図、第５図は第４図のＡ―Ａ線にお
ける断面図である。１……ピストン、４……ボス部、５……凹部、
６……リング溝、９……凹状溝。 1 to 3 show embodiments of the present invention,
Figure 1 is a vertical cross-sectional front view of the cylinder section of the engine.
Figure 2 is a sectional view taken along the - line in Figure 1;
The figure is a sectional view taken along the line -- in FIG. 4 and 5 show a conventional example, where FIG. 4 is a view corresponding to FIG. 1, and FIG. 5 is a sectional view taken along the line AA in FIG. 4. 1... Piston, 4... Boss part, 5... Recessed part,
6...Ring groove, 9...Concave groove.

Claims

[Scope of utility model registration request]

An inwardly recessed portion is formed on the outer end surface of the piston pin boss portion of the piston, and the upper surface of the recess communicates with the ring groove, while the lower surface of the recess is provided on the side surface of the lower portion of the piston. An engine piston structure characterized by communicating with a vertically extending concave groove.