JPH0256805U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の要部を拡大して示す縦断面図
、第２図はその上面図、第３図は従来のオイル戻
し穴を含む内燃機関の模式図である。 １……内燃機関、５……シリンダヘツド、６…
…ヘツドカバー、８……オイルパン、９……オイ
ル戻し穴（従来）、１２……オイル戻し穴（本考
案）、１３……間隙、１５……ガス抜き管、１６
……上端、１７……上部開口、２０……ステー。 FIG. 1 is an enlarged vertical cross-sectional view of the main parts of the present invention, FIG. 2 is a top view thereof, and FIG. 3 is a schematic diagram of an internal combustion engine including a conventional oil return hole. 1... Internal combustion engine, 5... Cylinder head, 6...
...Head cover, 8...Oil pan, 9...Oil return hole (conventional), 12...Oil return hole (present invention), 13...Gap, 15...Gas vent pipe, 16
...Top end, 17...Top opening, 20...Stay.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 潤滑を必要とするものを収容しているシリンダ
ヘツド側の空間とオイルを溜めるオイルパン側の
空間とを上下に連通するオイル戻し穴を有する内
燃機関において、前記オイル戻し穴の中に、前記
オイル戻し穴の内壁との間に戻しオイルが通過す
るに十分な間隙が残るように、且つその上端が前
記オイル戻し穴のシリンダヘツド側開口よりも高
い位置にあると共に、下端が前記オイル戻し穴の
オイルパン側開口付近にあるように、両端の開放
した中空のガス抜き管を固定的に設けたことを特
徴とする、二重穴構造をもつシリンダブロツクの
オイル戻し穴。 In an internal combustion engine that has an oil return hole that vertically communicates a space on the cylinder head side that accommodates things that require lubrication and a space on the oil pan side that stores oil, the oil is stored in the oil return hole. The upper end is located at a higher position than the cylinder head side opening of the oil return hole, and the lower end is located at a position higher than the cylinder head side opening of the oil return hole so that a sufficient gap remains between the oil return hole and the inner wall of the oil return hole for the return oil to pass through. An oil return hole in a cylinder block with a double hole structure, characterized by a fixed hollow gas vent pipe with both ends open near the opening on the oil pan side.