JP2557968Y2 - Internal combustion engine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine such as a general-purpose small engine.

FIG. 4 shows a rear view of such a conventional internal combustion engine. 4, reference numeral 30 denotes a fuel tank formed by blow-molding a synthetic resin; 34, a crankcase; 38, a carburetor; 39, an air cleaner;
Is an ignition plug cap , 45 is an output shaft, 50 is a fuel pipe made of a flexible material such as rubber, 51 is a return pipe for returning the fuel overflowed by the carburetor 38 to the fuel tank 30, 52 is a fuel pipe of the carburetor 38. A priming button for filling the reservoir, 60 is a cylinder cover, and 61 is a muffler cover.

[0003] One end of a fuel pipe 50 is connected to a nipple 53 provided on the outer surface of the fuel tank 30, and is connected to a crankcase.
The other end passes through the vicinity of the priming button 52 and is connected to the vaporizer 38.

[0004]

In the above-mentioned conventional internal combustion engine, the fuel pipe 50 passes near the crankcase 34, so that when the internal combustion engine oscillates or vibrates, the fuel pipe 50 becomes high in temperature. When the temperature of the fuel passing through the fuel pipe 50 rises, the fuel vaporizes and the operation of the internal combustion engine becomes unstable, and the hot restartability of the internal combustion engine decreases.

The fuel pipe 50 is provided with a priming button.
When the priming button 52 is operated, the fuel pipe 50 hinders the operation of the priming button 52, so that it is difficult to operate the priming button 52.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and the gist of the invention is to use a flexible material having one end connected to a synthetic resin fuel tank. A fuel pipe having the other end connected to a carburetor through the vicinity of a crankcase and a priming button of the internal combustion engine, a groove in which the fuel pipe is inserted into an outer surface of the fuel tank; An internal combustion engine is characterized in that a clip portion formed by partially reducing the width is integrally formed.

[0008]

According to the present invention, since the fuel pipe has the above-mentioned structure, the fuel pipe is inserted into the concave groove and is clamped by the clip portion, so that the fuel pipe does not approach or come into contact with the crankcase. No, and the fuel pipe is not in the way when operating the priming button.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS. 1 to 3, wherein FIG. 1 (A) is a side view of a main part partially broken along the arrow A in FIG. 3, and FIG. A) A partial arrow view along arrow B,
(C) is a partial sectional view taken along line CC of (B), FIG. 2 is a right side view of the internal combustion engine, and FIG. 3 is a front view of the internal combustion engine.

A groove 31 into which the fuel pipe 50 is inserted is formed on the upper outer surface of the fuel tank 30, and a clip portion 32 formed by partially reducing the width of the groove 31 is formed integrally with the fuel tank 30 by integral molding. Have been. Other configurations are the same as those of the conventional one shown in FIG. 4, and corresponding members are denoted by the same reference numerals. In the drawing, reference numeral 62 denotes an engine stop button, and reference numeral 63 denotes a cap.

However, one end of the fuel pipe 50 is a nipple.
53, and the other end is connected to the carburetor 38 as in the conventional one, except that the middle part of the fuel pipe 50 is inserted into the concave groove 31, and at that time, a part thereof is clipped. It is deformed by being pushed into the portion 32 and is held by the clip portion 32.

Thus, the distance between the fuel pipe 50 and the crankcase 34 facing the fuel pipe 50 increases, and the fuel pipe 50 moves due to the swinging or vibration of the internal combustion engine.
Since the fuel does not approach or come into contact with the fuel pipe 50, the fuel passing through the fuel pipe 50 is not heated by the heat radiated from the crankcase 34 and does not rise in temperature.

The fuel pipe 50 has a priming button.
The fuel pipe 50 does not interfere with a hand or a finger when operating the priming button 52 since the priming button 52 is operated, so that the priming button 52 can be easily operated. Note that the concave groove 31 and the clip portion 32 can be easily formed integrally with the fuel tank 30, and the fuel pipe 50 is deformed when clamped by the clip portion 32. There is no hindrance.

[00114]

According to the present invention, the fuel pipe does not approach or come into contact with the crankcase because the fuel pipe is inserted into the concave groove and is clamped by the clip portion. As a result, the temperature of the fuel passing through the fuel pipe does not rise, so that the operation of the internal combustion engine is stabilized and the hot restartability is not hindered. Further, the priming button can be easily operated because the fuel pipe does not interfere with the operation of the priming button.

[Brief description of the drawings]

1A and 1B show one embodiment of the present invention, wherein FIG. 1A is a side view of a main part partially broken along an arrow A of FIG. 3, and FIG. 1B is a side view of FIG.
FIG. 3C is a partial cross-sectional view taken along line CC of FIG.

FIG. 2 is a right side view of the internal combustion engine according to the embodiment of the present invention.

FIG. 3 is a front view of the internal combustion engine according to one embodiment of the present invention.

FIG. 4 is a rear view of a conventional internal combustion engine.

[Explanation of symbols]

 30 Fuel tank 50 Fuel pipe 34 Crankcase 52 Priming button 38 Vaporizer 31 Groove 32 Clip

Claims (1)

(57) [Scope of request for utility model registration] 1. An internal combustion engine having a fuel pipe made of a flexible material having one end connected to a synthetic resin fuel tank and having the other end connected to a carburetor through a vicinity of a crankcase and a priming button of the internal combustion engine. An internal combustion engine, wherein a concave groove in which the fuel pipe is inserted into the outer surface of the fuel tank and a clip portion formed by partially reducing the width of the concave groove are integrally formed.