Air filter of gasoline engine

Abstract

The utility model discloses a gasoline engine air filter which comprises an air filter outer cover, a handle bolt, an air filter inner cover, a sponge filter element and a paper filter element, the sponge filter element is arranged in a cavity defined by the air filter outer cover and the air filter inner cover, and the sponge filter element and the paper filter element can be exchanged. The air filter assembly is easy to operate and convenient to use, the function that the sponge filter element and the paper filter element can be exchanged is achieved under the condition that the air filter assembly is not replaced, and the using requirements of an engine in different working environments are met.

Description

Technical Field

[0001] This utility model relates to the field of gasoline engine technology, and in particular to a gasoline engine air filter with interchangeable sponge filter element and paper filter element. Background Technology

[0002] The air filter is a crucial component of the gasoline engine's intake system. Its function is to provide clean air to the engine and prevent air containing impurities from entering the cylinders, thus preventing wear and damage. The main components of an air filter are the filter element and the housing. Air filter elements come in various types, including sponge filters, paper filters, and oil bath filters, used alone or in combination. Different types of filter elements are suitable for different gasoline engine operating environments.

[0003] Chinese utility model patent document CN203954895U discloses a dual-filtration air filter, including a housing and a top cover disposed on top of the housing. The inner cavity of the housing and the inner cavity of the top cover are connected. An air inlet pipe is provided on the top cover, and an air outlet pipe is provided on the housing. A filter element device is disposed between the top cover and the housing. The air inlet pipe, the inner cavity of the top cover, the filter element device, the inner cavity of the housing, and the air outlet pipe form an airflow passage. The filter element device includes a mounting frame, a filter paper assembly, and a sponge. An installation port is provided in the middle of the mounting frame, and the filter paper assembly is disposed on the installation port. The sponge and the filter paper assembly work together to achieve dual-layer filtration, improve the strength of the entire filter element device, and extend the service life of the air filter. However, this type of air filter uses a combination of sponge and filter paper, and the sponge filter element and the paper filter element cannot be interchanged. If the operating environment changes and the filter element type needs to be changed, the entire air filter assembly must be replaced at the same time. Summary of the Invention

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a gasoline engine air filter. Its advantages are: the utility model is simple to operate and convenient to use, and it enables the interchangeability of sponge filter elements and paper filter elements, thus meeting the usage requirements of gasoline engines in different operating environments.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A gasoline engine air filter includes an air filter outer cover, a handle bolt, an air filter inner cover, a sponge filter element, and a paper filter element, characterized in that: a sponge filter element is disposed in the cavity formed by the air filter outer cover and the air filter inner cover, and the sponge filter element is interchangeable with the paper filter element.

[0007] Furthermore, the inner cavity of the air filter outer cover is provided with a stiffening plate A, the inner cavity of the stiffening plate A is provided with a stiffening plate B, and the inner cover of the air filter is provided with an outer peripheral stiffening plate C, the stiffening plate C matching the stiffening plate A.

[0008] Furthermore, the air filter cover is provided with a limiting rib, which limits the sponge filter element when the air filter cover is closed.

[0009] Furthermore, a slot is provided at the lower part of the inner cover of the air filter, and a hinge shaft is provided at the lower part of the outer cover of the air filter, the hinge shaft being connected to the slot.

[0010] Furthermore, an air inlet is provided at the lower part of the air filter cover.

[0011] Furthermore, the air filter inner cover is provided with a cover plate, the air filter inner cover is provided with an exhaust gas pipe interface and an exhaust gas outlet, and the cavity formed by the air filter inner cover and the cover plate connects the exhaust gas pipe interface and the exhaust gas outlet.

[0012] Furthermore, the outer cover of the air filter is provided with bolt through holes; the root of the handle bolt is provided with a smooth rod and the end is provided with threads, and the handle bolt passes through the bolt through holes to connect with the inner cover of the air filter.

[0013] Furthermore, the bolt through hole is a tapered hole, with the large end diameter being larger than the thread diameter and the small end diameter being larger than the smooth rod diameter but smaller than the thread diameter.

[0014] The beneficial effects of this utility model are: This utility model provides an air filter in which sponge filter element and paper filter element can be freely switched without replacing the air filter assembly. At the same time, it solves the problems of easy loss and detachment of handle bolts during disassembly and oil and gas directly entering the intake pipe through the guide channel to avoid contaminating the filter element. It has the advantages of ingenious structural design, simple operation and convenient use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention.

[0016] Figure 2 This is a cross-sectional view of the sponge filter element assembled in this utility model.

[0017] Figure 3 This is a cross-sectional view of the paper filter element assembled in this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the air filter cover of this utility model.

[0019] Explanation of the serial numbers in the attached diagram:

[0020] 1. Air filter outer cover; 2. Handle bolt; 3. Bolt through hole; 4. Smooth rod; 5. Thread; 6. Air filter inner cover; 7. Exhaust pipe interface; 8. Cover plate; 9. Air outlet; 10. Slot; 11. Hinge shaft; 12. Rib C; 13. Rib A; 14. Rib B; 15. Air inlet; 16. Sponge filter element; 17. Paper filter element; 18. Limiting rib. Detailed Implementation

[0021] It should be noted that the directional terms that may be used in the following paragraphs, including but not limited to "up, down, left, right, front, back, inside, outside", are all based on the view orientation shown in the accompanying drawings of the specification. Their purpose is only to help those skilled in the art better understand the technical solution of this utility model, and they should not be regarded as a limitation on the protection scope or technical solution of this utility model.

[0022] It should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "assembly," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0024] like Figure 1-4 As shown, a gasoline engine air filter includes an outer air filter cover 1, a handle bolt 2, an inner air filter cover 6, a sponge filter element 15, and a paper filter element 17. The sponge filter element 16 is disposed within the cavity formed by the outer air filter cover 1 and the inner air filter cover 6. The sponge filter element 16 is interchangeable with the paper filter element 17. A rib A13 is disposed within the inner cavity of the outer air filter cover 1, and a rib B14 is disposed inside the rib A13. The inner air filter cover 6 is disposed with an outer peripheral rib C12, which matches the rib A13. A limiting rib 18 is provided in the outer air filter cover 1; when the outer air filter cover 1 is closed, the limiting rib 18 limits the sponge filter element 16. A slot 10 is provided at the lower part of the inner air filter cover 6, and a hinge shaft 11 is provided at the lower part of the outer air filter cover 1, with the hinge shaft 11 connected to the slot 10. An air inlet 15 is provided at the lower part of the outer air filter cover 1. The air filter inner cover 6 is provided with a cover plate 8, and the air filter inner cover 6 is provided with an exhaust gas pipe interface 7 and an air outlet 9. The cavity formed by the air filter inner cover 6 and the cover plate 8 connects the exhaust gas pipe interface 7 and the air outlet 9.

[0025] The air filter outer cover 1 is provided with a bolt through hole 3. The handle bolt 2 has a smooth rod 4 at its base and a thread 5 at its end. The handle bolt 2 passes through the bolt through hole 3 and connects to the air filter inner cover 6. The bolt through hole 3 is a tapered hole, with the diameter of the larger end being larger than the diameter of the thread 5, and the diameter of the smaller end being larger than the diameter of the smooth rod 4 but smaller than the diameter of the thread 5.

[0026] In use, when the sponge filter element 16 is installed, it is fitted tightly into the rib plate B14 of the air filter outer cover 1. The rib plate A13 of the air filter outer cover 1 and the outer circumferential rib plate C12 of the air filter inner cover 6 are sealed and matched. The limiting rib 18 supports the sponge filter element 16 to prevent deformation, and at the same time, after the polluted air enters through the air inlet 15, the limiting rib 18 guides and diverts the high-speed airflow.

[0027] When a paper filter element 17 is used, it is installed inside the outer peripheral rib plate C12 of the air filter inner cover 6, ensuring a tight fit. The rib plate B14 of the air filter outer cover 1 presses and seals the paper filter element 17, while the rib plate A13 of the air filter outer cover 1 seals and matches the outer peripheral rib plate C12 of the air filter inner cover 6. This ensures that polluted air can only enter through the air inlet 15 at the bottom of the air filter outer cover 1, be filtered by the sponge filter element 16 or the paper filter element 17, and then enter the cylinder, preventing polluted air from escaping into the cylinder without being filtered and causing cylinder wear.

[0028] The cavity formed by the inner cover 6 and the cover plate 8 of the air filter forms a well-sealed guide channel, which connects the exhaust pipe interface 7 and the exhaust port 9, so that the oil and gas entering the air filter from the exhaust pipe interface 7 are guided to the exhaust port 9 and discharged into the intake pipe of the gasoline engine, and finally enter the cylinder to participate in combustion.

[0029] The air filter outer cover 1 adopts a door-type opening and closing structure. When the filter element needs to be removed, the handle bolt 2 is loosened and the air filter outer cover 1 is controlled to rotate around the hinge shaft 11, which has a large degree of freedom. At the same time, the tight fit between the slot 10 and the hinge shaft 11 ensures the tight fit between the air filter outer cover 1 and the air filter inner cover 6.

[0030] The tapered hole design of the bolt through hole 3 facilitates the insertion of the handle bolt 2. At the same time, the small end design of the bolt through hole 3 prevents the handle bolt 2 from coming out when replacing the filter element. After the handle bolt 2 is tightened, it can ensure a tight and reliable fit between the air filter outer cover 1 and the air filter inner cover 6.

[0031] The above figures and descriptions represent only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the protection scope of the present invention.

Claims

1. A gasoline engine air filter, comprising an air filter outer cover (1), a handle bolt (2), an air filter inner cover (6), a sponge filter element (16), and a paper filter element (17), characterized in that: A sponge filter element (16) is provided in the cavity formed by the outer cover (1) and the inner cover (6) of the air filter. The sponge filter element (16) can be interchanged with the paper filter element (17).

2. A gasoline engine air filter according to claim 1, characterized in that: The air filter outer cover (1) is provided with a stiffener A (13) inside the cavity, and a stiffener B (14) is provided inside the stiffener A (13). The air filter inner cover (6) is provided with an outer peripheral stiffener C (12), and the stiffener C (12) matches the stiffener A (13).

3. A gasoline engine air filter according to claim 1, characterized in that: The air filter cover (1) is provided with a limiting rib (18). When the air filter cover (1) is closed, the limiting rib (18) limits the sponge filter element (16).

4. A gasoline engine air filter according to claim 1, characterized in that: The air filter inner cover (6) is provided with a slot (10) at the bottom, and the air filter outer cover (1) is provided with a hinge shaft (11) at the bottom, and the hinge shaft (11) is connected to the slot (10).

5. A gasoline engine air filter according to claim 1, characterized in that: An air inlet (15) is provided at the lower part of the air filter cover (1).

6. A gasoline engine air filter according to claim 1, characterized in that: The air filter inner cover (6) is provided with a cover plate (8), and the air filter inner cover (6) is provided with an exhaust pipe interface (7) and an air outlet (9). The cavity formed by the air filter inner cover (6) and the cover plate (8) connects the exhaust pipe interface (7) and the air outlet (9).

7. A gasoline engine air filter according to claim 1, characterized in that: The air filter outer cover (1) is provided with a bolt through hole (3); the handle bolt (2) is provided with a smooth rod (4) at the root and a thread (5) at the end, and the handle bolt (2) passes through the bolt through hole (3) and connects to the air filter inner cover (6).

8. A gasoline engine air filter according to claim 7, characterized in that: The bolt through hole (3) is a tapered hole, with the large end diameter being larger than the thread (5) diameter and the small end diameter being larger than the smooth rod (4) diameter and smaller than the thread (5) diameter.

Images