CN201606132U - Breathing structure of general gasoline engine tank body - Google Patents

Abstract

The utility model discloses a breathing structure of a general gasoline engine tank body. The tank body wall of one side of the engine tank body positioned near a supporting crank shaft is provided with a tubular body breathing structure projected out the tank body wall, and the tube wall of the tubular body breathing structure is extended out from the tank body wall to form a heat delivery surface. The outer port of the tubular body breathing structure is provided with a seal cover, and the seal cover is provided with a vent hole and is communicated with an air filter by a breather pipe. The tubular body breathing structure is positioned at the combining part of a crank case and a cylinder and at the backward position of an air fairing and is adjacent to the air fairing installed on the engine tank body, and one part of tube wall of the tubular body breathing structure is connected with the cooling fin of the outer surface of the cylinder. The tubular body breathing structure projected out the tank body wall is extended out from the tank body wall to form the heat delivery surface, so the heat delivery area of the breathing structure is increased. The tubular body breathing structure is arranged at the combining part of the crank case and the cylinder and is adjacent to the air fairing, so the cooling effect of the breathing structure can be enhanced.

Description

The breathing structure of all-purpose gasoline box body

Technical field

The utility model relates to the casing of motor, particularly a kind of breathing structure of all-purpose gasoline box body.

Background technique

During engine operation, the machine oil in the engine housing can produce a large amount of machine oil boil-off gas, and as not taking measures, the machine oil boil-off gas can be scurried in the firing chamber from the gap between piston and the cylinder, influences the performance of motor; And these machine oil boil-off gas directly are discharged in the atmosphere, pollute the environment again.So be typically provided with respiratory slot in the existing all-purpose gasoline box body, respiration by respiratory slot when engine operation is got rid of the waste gas in the casing, reduce the air pressure of machine oil boil-off gas, and sucking fresh cold air cools off the machine oil boil-off gas in the case, the machine oil that makes the cooling back form oil droplet flows back to oil pan, prevent that the machine oil boil-off gas from scurrying into the firing chamber, reduce the exhaust emission of the machine oil boil-off gas in the case simultaneously.The respiratory slot of existing all-purpose gasoline box body generally is to be located in the casing, the pneumostome of respiratory slot and box body wall are in same plane basically, cause the heat radiation film-cooled heat that respiratory slot is played cooling action only to account for 30% of the respiratory slot gross area, the heat radiation cooling effect of respiratory slot is not obvious, cause the interior machine oil boil-off gas of casing still can scurry into and influence engine performance in the firing chamber, the gas that discharges of breathing out simultaneously still has a considerable amount of machine oil boil-off gas, causes the pollution to ambient air.At this situation, be to reduce exhaust emission, just have only and adopt high-quality machine oil, engine oil quality requires high, and the price height causes the user cost height of general gasoline engines.

Summary of the invention

The purpose of this utility model is the deficiency that exists at prior art, a kind of breathing structure of all-purpose gasoline box body is provided, its adopts the cylinder breathing structure protrude from box body wall from the box body wall formation heat dispersing surface that stretches out, increased the heat diffusion area of breathing structure, and the cylinder breathing structure is arranged on the connecting part of crankcase and cylinder, and adjacent with the air conducting cover, can improve the cooling effect of breathing structure.

The purpose of this utility model is achieved in that the engine housing that comprises that cylinder and crankcase are connected as a single entity, the cylinder part of engine housing exceptionally surface forming has radiating fin, the wall that the crankcase of engine housing partly supports bent axle is provided with axis hole, on the box body wall of wall next door one side that being positioned at of engine housing supported bent axle, the cylinder breathing structure that protrudes from box body wall is set, the barrel of cylinder breathing structure is from the box body wall formation heat dispersing surface that stretches out, the external port of cylinder breathing structure is provided with sealing cover, sealing is covered with vent and is communicated with air-strainer by breathing pipe, described cylinder breathing structure is positioned at the connecting part of crankcase and cylinder, and the downstream that is positioned at the air conducting cover is adjacent with the air conducting cover that is installed on the engine housing, and a part of barrel of cylinder breathing structure links to each other with the radiating fin of cylinder outer surface.

The barrel of described cylinder breathing structure is at least 60% of the cylinder breathing structure gross area from the outward extending heat dispersing surface of box body wall.

Described cylinder breathing structure is prism-shaped cylindrical shell or cylindrical barrel.

Be provided with the labyrinth structure that is used to filter cooling in the described cylinder breathing structure.

Described sealing cover is fixed by bolts on the casing.

Owing to adopted such scheme, the breathing structure of all-purpose gasoline box body is set to protrude from the cylinder breathing structure of box body wall, the barrel of cylinder breathing structure is from the box body wall formation heat dispersing surface that stretches out, make from the outward extending heat dispersing surface of box body wall and be at least more than 60% of the cylinder breathing structure gross area, 30% the respiratory slot that so just makes heat diffusion area and the existing heat radiation film-cooled heat of the breathing structure of all-purpose gasoline box body only account for the respiratory slot gross area is compared, its heat diffusion area is greatly improved, and the heat radiation cooling effect obviously is better than existing respiratory slot.And, described cylinder breathing structure is positioned at the connecting part of crankcase and cylinder, and the downstream that is positioned at the air conducting cover is adjacent with the air conducting cover that is installed on the engine housing, a part of barrel of cylinder breathing structure links to each other with the radiating fin of cylinder outer surface, so just can make the powerful cooling air that blows out from the general gasoline engines fan, under the leading role of air conducting cover, directly blow to the cylinder breathing structure, quicken the heat exchange of cylinder breathing structure, oily vapours in the cylinder breathing structure is cooled off fast, forming oil droplet flows back in the oil pan of bottom half, avoiding oily vapours to scurry into the firing chamber influences engine performance, improves the performance of motor thus; Or prevent that oily vapours from flowing to air-strainer by breathing pipe, cause waste, and air-strainer is formed pollution; Can also reduce simultaneously exhaust gas discharging in the case.A part of barrel of described cylinder breathing structure links to each other with the radiating fin of cylinder outer surface, further enlarges heat diffusion area by radiating fin, and radiating effect is further enhanced.

Described cylinder breathing structure is prism-shaped cylindrical shell or cylindrical barrel, the cold wind that makes the cylinder breathing structure have at least the surface area more than 33% to blow in face of fan, and the powerful cold wind that fan is blown skims over from cylinder breathing structure surface fast and takes away heat, strengthens the cooling effect of cylinder breathing structure to oily vapours.The external port of cylinder breathing structure is provided with sealing cover, sealing is covered with vent and is communicated with air-strainer by breathing pipe, cool air after air-strainer filters is entered in the casing from the cylinder breathing structure through vent, oily vapours in the dilution casing, and reduce the temperature of oily vapours simultaneously, form oil in the oily vapours cooling, after gas separates, the oil droplet of cohesion flows back at the bottom of the case, gas after the filtration can enter air-strainer through vent again, be used from fuel oil with the fresh air one after filtering again and mix the formation combination gas, utilize the pollution of the respiratory function elimination casing toxic emission of cylinder breathing structure thus.This breathing structure of the strong cooling of oily vapours that makes can avoid oily vapours directly to enter air-strainer from vent, influences the filtering effect of air-strainer.

The utility model is described in further detail below in conjunction with drawings and Examples.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the schematic representation of the utility model high wind heat radiation.

In the accompanying drawing, 1 is the cylinder breathing structure, and 2 is cylinder, and 2a is a radiating fin, and 3 is crankcase cover, 3a is an axis hole, and 4 is crankcase, and 4a is an axis hole, and 5 is the air conducting cover, and 6 is sealing cover, 7 is bolt, and 8 is air-strainer, and 9 is breathing pipe, and 10 is Carburetor, and 11 is the wind direction arrow.

Embodiment

Referring to Fig. 1, Fig. 2, a kind of embodiment of the compulsive-cooling breathing structure of all-purpose gasoline box body, comprise the engine housing that cylinder 2 and crankcase 4 are connected as a single entity, the cylinder part of engine housing exceptionally surface forming has radiating fin 2a, the wall that the crankcase of engine housing partly supports bent axle is provided with axis hole 4a, bent axle one end of motor cooperates with axis hole by bearing, the axle head of bent axle stretches out crankcase 4 outward and is used to install fan (not shown go out), make bent axle can drive the fan rotation, utilize fan that motor is lowered the temperature; The other end of bent axle is supported in the axis hole 3a of crankcase cover 3; Direction in fan blowing is provided with air conducting cover 5, and the side of the wind guiding engine housing that fan can be blown out (see among Fig. 2 shown in the wind direction arrow 11) makes the motor side also can get the wind cooling.Described air conducting cover 5 adopts bolt to be fastened on the engine housing.On the box body wall of wall next door one side that being positioned at of engine housing supported bent axle, the cylinder breathing structure 1 that protrudes from box body wall is set, described cylinder breathing structure 1 is positioned at the connecting part of crankcase 4 and cylinder 2, and the downstream that is positioned at air conducting cover 5 is adjacent with the air conducting cover that is installed on the engine housing, a part of barrel of cylinder breathing structure 1 links to each other with the radiating fin 2a of cylinder outer surface, can utilize radiating fin further to enlarge radiating effect.Described cylinder breathing structure is prism-shaped cylindrical shell or cylindrical barrel, make the cylindrical shell of cylinder breathing structure that the wind direction of more surface towards fan can be arranged, also be beneficial to simultaneously wind fast from the inclined-plane of cylindrical shell or arc surface whip and take away heat and improve rate of heat exchange, present embodiment adopts the prism-shaped cylindrical shell.The barrel of cylinder breathing structure is from the box body wall formation heat dispersing surface that stretches out, this heat dispersing surface is at least 60% of the cylinder breathing structure gross area, the cold wind that heat dispersing surface has at least the surface area more than 33% to blow in face of fan, make the cylinder breathing structure that bigger area heat radiation is arranged like this, especially having relatively large wall to accept powerful cold wind facing to the direction of the wind comes from brushes, the barrel heat transfer rate accelerates, and oily vapours in the cylinder breathing structure is cooled off fast and flows back in the oil pan of casing.Be provided with the labyrinth structure that is used to filter cooling in the described cylinder breathing structure, oily vapours obtains filtering through labyrinth structure the time, cooling, and oil droplet flows back to casing inner engine oil dish.The external port of cylinder breathing structure is provided with sealing cover 6, and sealing lid 6 is provided with a vent and is communicated with air-strainer 8 by breathing pipe 9, and air-strainer 8 is communicated with Carburetor 10.Described sealing cover 6 usefulness bolts 7 are fixed on the installation double-screw bolt that is provided with on the casing, double-screw bolt is installed on the casing in the tube chamber of cylinder breathing structure, is provided with one, just can sealing cover is fixing firmly with a bolt, a plurality of double-screw bolts are set on also can the casing outside cylindrical shell and sealing cover are fixed with a plurality of bolts.Described bolt 7 adopts the fastening better effects if of hexagon bolt with flange.

Adopt the cylinder breathing structure of this all-purpose gasoline box body, by increasing heat diffusion area, forms bigger face fan wind to the windward side, utilize the powerful flow of fan cooled wind, oily vapours rate of cooling in the cylinder breathing structure is accelerated, and cooling effect is greatly improved.

Claims (5)

1. the breathing structure of an all-purpose gasoline box body, comprise the engine housing that cylinder and crankcase are connected as a single entity, the cylinder part of engine housing exceptionally surface forming has radiating fin, the wall that the crankcase of engine housing partly supports bent axle is provided with axis hole, it is characterized in that: on the box body wall of wall next door one side that being positioned at of engine housing supported bent axle, the cylinder breathing structure that protrudes from box body wall is set, the barrel of cylinder breathing structure is from the box body wall formation heat dispersing surface that stretches out, the external port of cylinder breathing structure is provided with sealing cover, sealing is covered with vent and is communicated with air-strainer by breathing pipe, described cylinder breathing structure is positioned at the connecting part of crankcase and cylinder, and the downstream that is positioned at the air conducting cover is adjacent with the air conducting cover that is installed on the engine housing, and a part of barrel of cylinder breathing structure links to each other with the radiating fin of cylinder outer surface.

2. the breathing structure of all-purpose gasoline box body according to claim 1 is characterized in that: the barrel of described cylinder breathing structure is at least 60% of the cylinder breathing structure gross area from the outward extending heat dispersing surface of box body wall.

3. the breathing structure of all-purpose gasoline box body according to claim 1 and 2 is characterized in that: described cylinder breathing structure is prism-shaped cylindrical shell or cylindrical barrel.

4. the breathing structure of all-purpose gasoline box body according to claim 1 and 2 is characterized in that: be provided with the labyrinth structure that is used to filter cooling in the described cylinder breathing structure.

5. the breathing structure of all-purpose gasoline box body according to claim 1 is characterized in that: described sealing cover is fixed by bolts on the casing.

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