CN201041089Y - Crank box for general gasoline engine - Google Patents

Abstract

The utility model relates to a crankshaft box of universal gasoline engine, which comprises a box body, a cylinder block combined to a whole with the box body, an air deflector arranged at the upper and the lower sides of the cylinder block; the air deflector is combined to a whole with a cooling plate arranged at the upper and the lower sides of the cylinder block, which makes cooling paths form among the air deflector, the cylinder block and the cooling plate. The crankshaft box is arranged on the gasoline engine, which can make the cold air produced by the fan impeller of the gasoline engine flow out of the cooling paths, the upper and the lower parts of the cylinder block and the cooling plate arranged thereon can be cooled compulsorily, the heat of the cylinder block is taken off; thus the heat dissipation rate is effectively increased by the cold air flowing out of the cooling paths with high wind speed and strong wind power, which improves the radiating effect of the cylinder block.

Description

A kind of general gasoline engines crankcase body

Technical field

The utility model relates to a kind of crankcase body of general gasoline engines.

Background technique

The crankcase body of general gasoline engines comprises casing and the cylinder block two-part that combine as a whole with casing, and casing is used to install the lubricant oil of bent axle and splendid attire motor, and bottom half is provided with the base that combines as a whole with casing; Cylinder block is positioned at the casing upper right, is used to assemble piston and piston is slidingly matched, and forms the firing chamber with cylinder head.The cylinder block surface is provided with radiating fin, to help distributing of cylinder block heat, reduces the temperature of cylinder block, is beneficial to the normal reliable work of motor.But existing general gasoline engines is in practical work process, because its engine cylinder only depends on self and surperficial radiating fin thereof to carry out natural heat dissipation, this kind radiating mode heat dissipation rate is slow, radiating effect is poor, will cause harmful effect to petrol engine.

The model utility content

Technical problem to be solved in the utility model provides a kind of general gasoline engines crankcase body, to increase the heat dissipation rate of cylinder block, improves the radiating effect of cylinder block.

General gasoline engines crankcase body described in the utility model, the cylinder block that comprises casing, combines as a whole with casing, cylinder block is positioned at the casing upper right, its surface is provided with radiating fin, be provided with wind deflector in the upper and lower both sides of cylinder block, the radiating fin at place, the upper and lower both sides of wind deflector and casing and cylinder block combines as a whole, and makes between wind deflector and cylinder block and the radiating fin thereof and forms cooling duct.

The wind deflector that the upper and lower both sides of the cylinder block of the utility model crankcase body are provided with, be to be connected mutually on petrol engine with the wind scooper and the cowl hood of petrol engine, the common large-scale housing that forms of three, the cold wind that makes the interior blast fan of wind scooper produce is limited in flowing in the large-scale housing, and final concentrating, thereby the cylinder block of crankcase body is partly carried out the forced cooling cooling from the cooling duct outflow that forms between two wind deflectors and cylinder block and the radiating fin thereof.

The utility model is owing to have this kind structure, the cold wind that makes the petrol engine blast fan produce is concentrated from the cooling duct of crankcase body and is flowed out, thereby realize to the upper and lower two side portions of cylinder block and on radiating fin carry out the forced cooling cooling, the heat that cylinder block produces is taken away; And because the cooling duct cross-section area is little, strong from cold wind wind speed height, the wind-force that wherein flows out, so can increase the heat dissipation rate of cylinder block effectively, improve the radiating effect of cylinder block.

Description of drawings

Now in conjunction with the accompanying drawings the utility model is described in further detail.

Fig. 1 is the plan view of general gasoline engines crankcase body described in the utility model;

Fig. 2 is the plan view of Fig. 1;

Fig. 3 is the worm's eye view of Fig. 1;

Fig. 4 is the rear view of Fig. 1.

Embodiment

As shown in Figures 1 to 4, the cylinder block 4 that this general gasoline engines crankcase body comprises casing 1, combines as a whole with casing 1, cylinder block 4 is positioned at casing 1 upper right, its surface is provided with radiating fin 5, be provided with wind deflector 3 in cylinder block 4 upper and lower both sides, wind deflector 3 combines as a whole with the radiating fin 5 at casing 1 and place, cylinder block 4 upper and lower both sides, makes and forms cooling duct 2 between wind deflector 3 and cylinder block 4 and the radiating fin 5 thereof.

Claims (1)

1. general gasoline engines crankcase body, the cylinder block (4) that comprises casing (1), combines as a whole with casing, cylinder block is positioned at the casing upper right, its surface is provided with radiating fin (5), it is characterized in that: be provided with wind deflector (3) in the upper and lower both sides of cylinder block, the radiating fin at place, the upper and lower both sides of wind deflector and casing and cylinder block combines as a whole, and makes and forms cooling duct (2) between wind deflector and cylinder block and the radiating fin thereof.

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