Handheld multipurpose portable four-stroke gasoline engine

Abstract

The invention provides a handheld multipurpose portable four-stroke gasoline engine. The handheld multipurpose portable four-stroke gasoline engine comprises a crankshaft chamber, a valve distributionchamber, an oil storage chamber, a valve chamber and a rotary valve; the crankshaft chamber communicates with the valve distribution chamber through an oil inlet channel arranged on a crankshaft andan oil outlet channel arranged on a crankcase body; the rotary valve comprises a valve sleeve and a valve shaft; the valve shaft is a crankshaft journal; an outlet of the oil outlet channel is formedin the crankshaft journal; the valve distribution chamber communicates with the oil storage chamber through a lowermost oil return channel of the valve distribution chamber; the crankshaft chamber communicates with the oil storage chamber through an oil suction pipe; a copper ball is arranged at the tail end of the oil suction pipe; the valve chamber is arranged above an air cylinder; an oil-waterseparator is arranged in the valve chamber; a cylinder head communicates with the oil storage chamber through an external oil return pipe; an oil return inlet hole is formed in the cylinder head; andan oil return outlet hole is formed in a box body. According to the handheld multipurpose portable four-stroke gasoline engine, an oil-gas separation device cannot fail at any angle, a lubricating oil path works smoothly without oil injection or oil combustion, the engine is completely separated from oil, the engine oil consumption is low, the emission is good, and the product reliability is good; and the handheld multipurpose portable four-stroke gasoline engine can work by 360 degrees in a space, and the matching range is wide.

Description

technical field [0001] The invention relates to the field of gasoline engines, in particular to a hand-held multi-purpose portable four-stroke gasoline engine. Background technique [0002] Disclosed in CN102230406A is a patent of invention called "hand-held four-stroke gasoline engine lubricating system", which is to arrange crankshaft chamber, oil storage chamber, distribution chamber, pushrod chamber and valve chamber in the gasoline engine body. The crank chamber and the distribution chamber communicate with each other through the oil outlet passage arranged on the crankshaft diameter and the oil return passage arranged on the crankcase, and the oil outlet passage is a rotary valve structure. When the piston goes down, the crankshaft chamber is under positive pressure. At this time, the rotary valve is opened, and the oil from the crankshaft chamber passes through the oil outlet channel, the distribution chamber, and the push rod chamber to the valve chamber. When the pi...

AI Technical Summary

Problems solved by technology

Most of the hand-held tools need to be able to work smoothly at any angle, but the hand-held air-cooled four-stroke gasoline engines currently on the market mostly recover the lubricating oil through gravity to make the oil flow back into the lubricating oil chamber, which causes the gasoline engine to be turned upside down Or when the inclination angle is too large, the engine oil cannot be recovered, which will affect the normal operation of the gasoline engine, and although some four-stroke gasoline engines are equipped with special oil-gas separation devices, due to imperfect design, when the gasoline engine is inverted or the inclination angle is too large, the lubricating oil will fill the cylinder cover, the oil-air separation device loses its function, and the lubricating oil cannot return to the oil storage chamber, so that the gasoline engine cannot work normally

In this way, the engine oil will be burned for a while, and the oil in the oil storage chamber will be less in the second meeting, and the oil in the lubrication will be less, so that the engine will not work normally and even the cylinder will be scuffed.

Thereby limiting its matching range, therefore, it is urgent to develop a small air-cooled four-stroke gasoline engine which is suitable for supporting hand-held tools and can work stably at any angle.

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