JPS5816335U

JPS5816335U - piston cooling system

Info

Publication number: JPS5816335U
Application number: JP11202381U
Authority: JP
Inventors: 三枝　正治
Original assignee: ヤンマーディーゼル株式会社
Priority date: 1981-07-27
Filing date: 1981-07-27
Publication date: 1983-02-01

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図はピストンピンと直角な断面図、第２図はピスト
ンビシめ中心を含む縦断面図、第３図は第１図の■−■
断面図、第４図は第１図のピストンクラウンを除去した
状態におけるＩＶ−ＩＶ矢視上面図である。１・・・ピ
ストンクラウン、２・・・ピストンスカート、３・・・
ポル上、５・・・油室、１０・・・第１リング溝、１１
・・・内周面、１３・・・逃し孔、１８・・・きり孔、
１８ａ・・・傾斜部、１９・・・ピストンピンボス部。Figure 1 is a cross-sectional view perpendicular to the piston pin, Figure 2 is a longitudinal cross-sectional view including the center of the piston, and Figure 3 is from ■ to ■ in Figure 1.
The sectional view, FIG. 4, is a top view taken along the line IV--IV in a state where the piston crown of FIG. 1 is removed. 1... Piston crown, 2... Piston skirt, 3...
Port top, 5... Oil chamber, 10... First ring groove, 11
...Inner circumferential surface, 13...Escape hole, 18...Drill hole,
18a... Inclined part, 19... Piston pin boss part.

Claims

[Scope of utility model registration request]

The crown and skirt of the piston are tightened with multiple bolts to form an annular oil chamber near the first ring groove on the outer periphery of the joint between the two, and a relief hole is provided at the middle height of the inner circumferential surface of this oil chamber. In this piston, cooling oil is force-fed from the piston pin boss portion to the oil chamber through the drilled hole, and the upper end of the drilled hole is inclined in the circumferential direction to open into the annular oil chamber, thereby creating a swirling flow. A piston cooling device characterized in that the relief hole is inclined in a direction along the swirling flow.