Oil level gauge guide of engine

Abstract

An oil level gauge guide includes a cylindrical portion, a first pipe, and a second pipe. The cylindrical portion is provided on a crank case wall which defines a crank chamber including an oil reservoir of an engine, and includes a through hole which communicates the interior and exterior of the crank chamber with each other. The first pipe includes a first end held by the cylindrical portion, and a second end extending outside the crank chamber and fixed to the engine. The second pipe includes a first end held by the cylindrical portion, and a second end extending to the bottom of the crank chamber and fixed to the engine. The oil level gauge guide uses an arrangement pointing toward the lowermost portion of an oil pan, and yet has a high degree of freedom of the attaching position.

What is claimed is: 
     
         1 . An oil level gauge guide of an engine, the oil level gauge guide comprising:
 a cylindrical or substantially cylindrical portion provided on a wall that defines a crank chamber including an oil reservoir of the engine, the cylindrical or substantially cylindrical portion including a through hole that allows an interior and an exterior of the crank chamber to communicate with each other;   a first pipe including a first end held by the cylindrical or substantially cylindrical portion, and a second end extending outside the crank chamber and fixed to the engine; and   a second pipe including a first end held by the cylindrical or substantially cylindrical portion, and a second end extending to a bottom of the crank chamber and fixed to the engine.   
     
     
         2 . The oil level gauge guide of the engine according to  claim 1 , wherein the through hole of the cylindrical or substantially cylindrical portion includes:
 a first hole into which the first pipe is inserted;   a second hole into which the second pipe is inserted;   a communication hole that connects the first hole and the second hole; and   first and second O-rings respectively fitted on the first end of the first pipe and the first end of the second pipe; wherein   the first pipe is held in the first hole by the first O-ring; and   the second pipe is held in the second hole by the second O-ring.   
     
     
         3 . The oil level gauge guide of the engine according to  claim 2 , wherein
 the communication hole has a diameter smaller than a diameter of each of the first hole and the second hole;   a boundary portion between the first hole and the communication hole includes a tapered surface that decreases in diameter toward the communication hole; and   an opening edge of the first end of the second pipe includes a tapered surface that increases in diameter toward the communication hole.