JPS6427426U

JPS6427426U -

Info

Publication number: JPS6427426U
Application number: JP12296587U
Authority: JP
Priority date: 1987-08-11
Filing date: 1987-08-11
Publication date: 1989-02-16

Description

[Brief explanation of the drawing]

第１図は本考案を具体化した一実施例を示す縦
断面図、第２図は第１図のＸ―Ｘ線拡大断面図、
第３図は噴射管の別例を示す平断面図、第４図は
さらに別例を示す縦断面図である。ピストン……１、下端開口……１ａ、噴射ノズ
ルを構成するノズル本体……３及び噴射管……６
、噴射口部……６ａ，６ｂ、コネクテイングロツ
ド……７、頂面……７ａ、頂壁……９、円環状通
路……９ａ、入口……９ｂ、出口……９ｃ、別例
の噴射管……１０、さらに別の噴射口部……１１
ａ，１２ａ。 FIG. 1 is a longitudinal sectional view showing an embodiment embodying the present invention, FIG. 2 is an enlarged sectional view taken along the line X--X of FIG. 1,
FIG. 3 is a plan sectional view showing another example of the injection pipe, and FIG. 4 is a longitudinal sectional view showing still another example. Piston...1, lower end opening...1a, nozzle body constituting the injection nozzle...3 and injection pipe...6
, Nozzle section...6a, 6b, Connecting rod...7, Top surface...7a, Top wall...9, Annular passage...9a, Inlet...9b, Outlet...9c, Another example Injection pipe...10, yet another injection port part...11
a, 12a.

Claims

[Scope of utility model registration request]

An annular passage with an inlet and an outlet is provided in the outer periphery of the top wall of the piston connected to the connecting rod that constitutes the crank mechanism, and oil is injected from the opening at the lower end of the piston toward the inner surface of the top wall of the piston. For cooling the piston, an injection nozzle is installed below the piston, and the injection nozzle has an injection port oriented toward the entrance of the annular passage and an injection port oriented toward the center of the inner surface of the top wall of the piston. oil supply structure.