CN204921207U - Empty filter of secondary filter - Google Patents

Abstract

The utility model discloses an empty filter of secondary filter, including empty filter upper cover, lower of empty filter and empty filter base, still include cylindric level filtering ware, be provided with the filter core support in the level filtering ware casing, filter core A passes through the filter core support to be fixed in level filtering ware casing, and it has the inlet port to open on the lateral wall of level filtering ware casing, the level filtering ware links to each other with the hose, and the hose links to each other with the intake pipe, empty filter upper cover constitutes empty filter main part with lower of empty filter, and empty filter base is located sky filter main part below, is provided with the gas vent on the base, and the centibar from bottom to top on the base passes sky filter main part, is provided with the oil cup of filter core box under with in empty filter main part, and the cover has a filter core B on the out -of -the -box wall of filter core, has filter core C and filter core D up overlapping under from between out -of -the -box wall of filter core and the inner tube, the inner tube formation air conduction channel of oil cup and filter core box. The utility model discloses the relatively poor operational environment of air conditioning is filtered, is particularly useful for to simple structure, washing convenience.

Description

secondary filter air filter

technical field

The utility model relates to an air filter device of an internal combustion engine, in particular to an air filter suitable for secondary filtration in a working environment with poor air conditions.

Background technique

The air intake system of the internal combustion engine is usually equipped with an air filter, and the air filtered by the air filter is transported to the combustion chamber of the internal combustion engine through the carburetor, so as to prevent impurities in the air from damaging the moving parts in the combustion chamber, thereby affecting the service life of the internal combustion engine. Most of the existing air filters are for one-time filtration, which cannot filter the dust in the air well, especially in the environment with a particularly large amount of dust in the air, the air cannot meet the quality requirements of the intake air of the internal combustion engine; the few secondary-filtered air filters currently appearing Filters are usually complex in structure and inconvenient to clean.

The oil bath air filter is a kind of air filter, which uses the viscosity of the engine oil to absorb the impurities in the air, and the oil particles produced by the engine oil will be absorbed by the filter element, so that the impurities in the air will be effectively removed to achieve Improve the filtering effect, can effectively improve the air filtering effect, increase the service life of the internal combustion engine, and reduce fuel consumption. The existing oil bath air filter is usually composed of an air filter upper cover and an air filter base. The air filter upper cover and the air filter base are fastened together to form the main body of the air filter. The port is set on the base, and the oil cup is set in the main body of the air filter. The structure is complicated, and it is very inconvenient to clean. It is also impossible to observe the oil level in the oil cup from the outside of the air filter. You need to open the upper cover of the air filter to observe the oil level. .

Utility model content

Aiming at the above technical problems, the utility model provides a secondary filter air filter with simple structure, convenient cleaning and good filtering effect, especially suitable for working environment with poor air conditions.

The technical scheme of the utility model is as follows: a secondary filter air filter, including the upper cover of the air filter, the lower seat of the air filter and the base of the air filter, and also includes a cylindrical primary filter. A filter element bracket is provided, and the filter element A is fixed in the primary filter housing through the filter element bracket, and an air inlet hole is opened on the side wall of the primary filter housing;

The rear end of the primary filter is connected to the front end of the hose, and the rear end of the hose is connected to the intake pipe provided on the upper cover of the air filter; the upper cover of the air filter and the lower seat of the air filter are fastened together to form the main body of the air filter , the air filter base is located below the main body of the air filter, an air outlet is provided on the air filter base, the central rod on the air filter base passes through the main body of the air filter from bottom to top, and the upper cover of the air filter, the air The lower seat of the filter and the base of the air filter are locked together; the main body of the air filter is provided with a filter box and an oil cup, the oil cup is located directly below the filter box, and the filter box is set on the center rod and passed through the second The nut is locked, and the middle part of the outer wall of the filter box is extended horizontally to form the first filter pressing plate, and the first filter pressing plate is provided with an air hole; a filter support column is provided in the oil cup; a filter element B is set on the outer wall of the filter box , the filter element B is sandwiched between the filter element support column and the first filter element pressure plate, and the filter element C and the filter element D are set from bottom to top between the outer wall of the filter element box and the inner cylinder, and there is a distance between the filter element D and the top of the filter element box , the oil cup is also set on the center rod, and the diameters of the oil cup and the inner tube of the filter box are larger than the diameter of the center rod to form an air guide channel through up and down; the air enters the main body of the air filter from the primary filter, and passes through the filter element B Enter the oil cup, come out from the oil cup, enter the air guide channel through filter element C and filter element D, and then enter the exhaust port on the base of the air filter.

Preferably, the front end of the first-stage filter is provided with a first-stage filter cover, and the side of the first-stage filter housing close to the first-stage filter cover is provided with a second filter element pressing plate, and the second filter element pressing plate is connected to the first-stage filter element. A filter element compression spring is arranged between the filter covers to act on the first filter element pressing plate to compress the filter element A, so that the filtering effect is better.

Preferably, the inner cylinder of the filter box is provided with limiting ribs, and is pressed on the top of the filter element D, so that there is a distance between the filter element D and the top of the filter box, preventing the filter element D from moving to the top of the filter box and affecting the gas entering the air guide aisle.

Preferably, the oil cup is provided with an oil level observation port, so that the oil level change can be observed without removing the upper cover of the air filter, which is very convenient.

Preferably, the filter element A, filter element B, filter element C, and filter element D are all foam filter elements, which have low material cost, wide sources, and are easy to replace and install.

Preferably, the primary filter is provided with mounting lugs, which can fix the primary filter on other components and prevent the primary filter from shaking.

Preferably, the second nut is a wing nut, which can be rotated manually without tools, and is easy to operate.

Preferably, a sealing ring is provided at the joint between the upper cover of the air filter and the lower seat of the air filter, and a sealing ring is also provided at the installation position of the oil cup on the lower seat of the air filter to completely isolate the sand around the air filter. dust.

Working process: The air enters the first-stage filter through the air inlet hole on the side wall of the first-stage filter housing, and after being filtered by the filter element A, enters the hose from the first-stage filter, then enters the air intake pipe on the upper cover of the air filter, passes through The filter element B enters the oil cup. Due to the adhesion of the oil in the oil cup, the dust remaining in the air is stuck on the oil surface. The air continues to go up due to the suction of the carburetor, and the oil particles produced by the oil will be absorbed by the filter element. C and D are absorbed and filtered, and finally enter the carburetor through the exhaust port.

The beneficial effect of the utility model is: the air is firstly filtered by the primary filter, and then filtered by the filter element, the oil cup, and the filter element, which can better filter the dust in the air and provide cleaner air for combustion for the internal combustion engine, especially suitable for In the case of a large amount of air dust in a working environment such as a tiller. There is an oil level observation port on the oil cup, which is very convenient to observe the oil level in the oil cup without removing the upper cover of the air filter; when cleaning, only need to open the primary filter cover to take out the filter element A, put Open the upper cover of the air filter, unscrew the first nut, then the upper cover of the air filter can be separated from the lower seat of the air filter, and the filter elements B, C, and D can be taken out for cleaning; it has the characteristics of simple structure, ingenious design, and convenient cleaning. And can filter out impurities and dust in the air well.

Description of drawings

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

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a B-B sectional view of Fig. 2 .

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Combined with the secondary filter air filter shown in Figures 1-3, it consists of an air filter upper cover 1, an air filter lower seat 2, an air filter base 3, and a cylindrical primary filter 4, etc. The primary filter housing is provided with filter element brackets 41 that are evenly distributed along the circumference in parallel with the axial direction. The filter element A42 is fixed in the primary filter housing through the filter element bracket 41, and the side wall of the primary filter housing is provided with air inlet Holes 43; the front end of the first-stage filter 4 is provided with a first-stage filter cover 44, and the side of the first-stage filter housing near the first-stage filter cover 44 is provided with a second filter element pressing plate 45, and the second filter element pressing plate 45 is connected to the first-stage filter element. A filter element pressing spring 46 is arranged between the filter covers 44 to act on the first filter element pressing plate 45 to compress the filter element A42, so that the filtering effect is better. The first-stage filter 4 is also provided with mounting lugs 47, which can fix the first-stage filter on other components to prevent the first-stage filter from shaking.

The rear end of the primary filter 4 is connected to the front end of the hose 5, and the rear end of the hose 5 is connected to the intake pipe 11 provided on the air filter upper cover 1; the air filter upper cover 1 and the air filter lower seat 2 are fastened together together form the main body of the air filter, the air filter base 3 is located below the air filter main body, the air filter base 3 is provided with an exhaust port 31, the central rod 32 on the air filter base 3 passes through the air filter main body from bottom to top, and is combined with the first The nut 6 locks the upper cover 1 of the air filter, the lower seat 2 of the air filter and the base 3 of the air filter together; the main body of the air filter is provided with a filter box 7 and an oil cup 8, and the oil cup 8 is located directly below the filter box 7. The filter cartridge 7 is set on the central rod 32 and locked by the second nut 9, which is a wing nut.

The middle part of the outer wall of the filter box 7 extends outward horizontally to form a first filter press plate 71, and an air hole is provided on the first filter press plate 71; a filter support column 81 is provided in the oil cup 8; a filter element B72 is set on the outer wall of the filter box 7 , the filter element B72 is sandwiched between the filter element support column 81 and the first filter element pressure plate 71, and the filter element C73 and the filter element D74 are set between the outer wall and the inner cylinder of the filter element box 7 from bottom to top, and the limit rib is set on the inner cylinder of the filter element box 7 75, and press above the filter element D74, so that there is a distance between the filter element D74 and the top of the filter element box 7, preventing the filter element D from moving to the top of the filter element box and affecting the gas entering the air guide channel. Filter element A42, filter element B72, filter element C73, and filter element D74 are all foam filter elements, with low material cost, wide sources, and easy replacement and installation.

The oil cup 8 is also set on the center rod 32. The diameters of the inner tubes of the oil cup 8 and the filter cartridge 7 are both larger than the diameter of the center rod 32 to form an air guide channel 10 through up and down; the air enters the main body of the air filter from the primary filter 4 , enter the oil cup 8 through the filter element B72, come out from the oil cup 8 through the filter element C73 and filter D74 into the air guide channel 10, and then enter the exhaust port 31 on the air filter base 3. The oil cup 8 is also provided with an oil level observation port 82, and the oil level change can be observed without taking off the air filter upper cover, which is very convenient.

Preferably, a sealing ring is provided at the joint between the upper cover 1 of the air filter and the lower seat 2 of the air filter, and a sealing ring is also provided at the installation position of the oil cup 8 on the lower seat 2 of the air filter, so as to completely isolate the sand around the air filter. dust.

The filtration route of gas in the air filter is shown by the arrow in Figure 3.

Claims (8)

1. A secondary filter air filter, comprising an air filter upper cover (1), an air filter lower seat (2) and an air filter base (3), characterized in that it also includes a cylindrical primary filter (4 ), the filter element support (41) is arranged in the first-level filter housing, and the filter element A (42) is fixed in the first-level filter housing by the filter element support (41), and the side wall of the first-level filter housing is provided with air intake hole (43); The rear end of the primary filter (4) is connected to the front end of the hose (5), and the rear end of the hose (5) is connected to the intake pipe (11) provided on the air filter upper cover (1); the air filter The upper cover (1) and the lower seat of the air filter (2) are fastened together to form the main body of the air filter, the base of the air filter (3) is located below the main body of the air filter, and the air filter base (3) is provided with an exhaust port (31 ), the central rod (32) on the air filter base (3) passes through the main body of the air filter from bottom to top, and combines the first nut (6) to connect the air filter upper cover (1), the air filter lower seat (2) and the air filter The filter base (3) is locked together; a filter box (7) and an oil cup (8) are arranged in the main body of the air filter, the oil cup (8) is located directly below the filter box (7), and the filter box (7) Set on the central rod (32), and lock it by the second nut (9), the middle part of the outer wall of the filter box (7) extends outward horizontally to form the first filter element pressing plate (71), the first filter element pressing plate (71) is provided with an air hole; a filter element support column (81) is arranged in the oil cup (8); a filter element B (72) is set on the outer wall of the filter element box (7), and the filter element B (72) is clamped on the filter element support Between the column (81) and the first filter element pressing plate (71), a filter element C (73) and a filter element D (74) are set from bottom to top between the outer wall of the filter element box (7) and the inner cylinder, and the filter element D ( 74) There is a distance between the top of the filter box (7), and the oil cup (8) is also set on the center rod (32), and the diameter of the inner cylinder of the oil cup (8) and the filter box (7) is larger than the center The diameter of the rod (32) forms an air guide channel (10) through up and down; the air enters the main body of the air filter from the primary filter (4), enters the oil cup (8) through the filter element B (72), and flows from the oil cup (8 ) comes out through the filter element C (73) and filter element D (74) into the air guide channel (10), and then enters the exhaust port (31) on the air filter base (3). 2. The secondary filter air filter according to claim 1, characterized in that: the front end of the primary filter (4) is provided with a primary filter cover (44), and the primary filter housing is close to the primary filter One side of the device cover (44) is provided with a second filter element pressing plate (45), and a filter element pressing spring (46) is arranged between the second filter element pressing plate (45) and the primary filter cover (44) to act on the first A filter element pressing plate (45) thereby compresses the filter element A (42). 3. The secondary filter air filter according to claim 1, characterized in that: the inner cylinder of the filter box (7) is provided with limiting ribs (75), which are pressed on the top of the filter element D (74), so that the filter element There is a distance between D (74) and the top of the filter cartridge (7). 4. The air filter for secondary filtration according to claim 1, characterized in that: the oil cup (8) is provided with an oil level observation port (82). 5. The air filter for secondary filtration according to claim 1, characterized in that: said filter element A (42), filter element B (72), filter element C (73), and filter element D (74) are all foam filter elements. 6. The air filter for secondary filtration according to claim 1, characterized in that: the primary filter (4) is provided with mounting lugs (47). 7. The secondary filter air filter according to claim 1, characterized in that: the second nut (9) is a butterfly nut. 8. The air filter for secondary filtration according to claim 1, characterized in that: a sealing ring is provided at the joint between the upper cover (1) of the air filter and the lower seat (2) of the air filter, and the oil cup (8 ) A sealing ring is also provided at the installation position on the air filter lower seat (2).