Air filter assembly

Abstract

The utility model discloses an air filter assembly, belongs to the technical field of filters, and solves the problem that an air inlet pipe of an existing air filter assembly is insufficient in structural strength and connection reliability. The air inlet pipe comprises a prefilter and a main filter, the air inlet pipe is of a flat structure and comprises a rubber pipe and a high-position pipe which are arranged in a split mode, the rubber pipe is a bent pipe, one end of the rubber pipe is fixedly connected with an air inlet of the prefilter, and the other end of the rubber pipe is detachably connected with the high-position pipe. The high-position pipe is vertically arranged and extends to the position above the main filter, a rainproof cap is detachably installed at the end, away from the rubber pipe, of the high-position pipe, a first reinforcing column connecting the two side walls of the rubber pipe is arranged in the rubber pipe, and a second reinforcing column connecting the two side walls of the high-position pipe is arranged in the high-position pipe. According to the air filter assembly, the connection reliability and the structural strength of the air inlet pipe can be improved at the same time, and then the service life and the air inlet efficiency of the air filter assembly are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and more specifically, to an air filter assembly. Background Technology

[0002] Air filters are essential components of engines. Before entering the engine, air must pass through the air filter to ensure its safe and reliable operation. Existing air filter assemblies typically employ a two-stage filtration structure to improve filtration efficiency. For example, patents with publication numbers CN 201771643 U and CN 221568665U disclose air filter assemblies that generally include a pre-filter and a main filter. The pre-filter primarily uses a cyclone tube to filter the gas, creating a high-speed rotating airflow within the filter. Impurities and dust in the air undergo spiral-shaped centrifugal motion and reach the bottom, where they are discharged through the dust exhaust pipe, thus performing coarse dust filtration. The main filter, on the other hand, is a paper filter element that uses filter paper to filter out fine particles, acting as a safety filter. In practical applications, air enters the cyclone tube from the pre-filter's intake pipe for coarse filtration, then enters the main filter for fine filtration, and finally exits from the exhaust pipe for engine use.

[0003] In existing air filter assemblies, the intake pipe is directly connected to the pre-filter in a rigid connection. After prolonged use, this connection is prone to loosening due to frequent vibrations, resulting in a relatively short service life. Furthermore, the intake pipe is a one-piece curved pipe. If its size is increased to improve the intake area, the structural strength will be reduced. It is evident that the intake pipe with this curved structure restricts the intake efficiency of the air filter assembly.

[0004] Therefore, there is an urgent need to design a new type of air filter assembly to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art. Its purpose is to provide an air filter assembly that can simultaneously improve the connection reliability and structural strength of the intake pipe, thereby ensuring the service life and intake efficiency of the air filter assembly.

[0006] The technical solution of this utility model is as follows: an air filter assembly, including a pre-filter and a main filter, wherein the air inlet of the pre-filter is connected to an air inlet pipe, the main filter is installed on the top of the pre-filter, and the air outlet of the pre-filter is connected to the air inlet of the main filter, the air inlet pipe has a flat structure, and the air inlet pipe includes a separately arranged rubber hose and a high-position pipe, the rubber hose is a bent pipe, one end of the rubber hose is fixedly connected to the air inlet of the pre-filter, and the other end is detachably connected to the high-position pipe, the high-position pipe is arranged vertically and extends above the main filter, and a rain cap is detachably installed on the end of the high-position pipe away from the rubber hose, the rubber hose has a first reinforcing column connecting its two side walls, the high-position pipe has a second reinforcing column connecting its two side walls, and the first reinforcing column and the second reinforcing column are staggered.

[0007] As a further improvement, the outer wall of the hose is provided with longitudinal and annular cross reinforcing ribs, the outer walls of both the upper and lower ends of the high-position tube are provided with annular reinforcing ribs, and the outer wall of the middle part of the high-position tube between the annular reinforcing ribs is also provided with oblique cross reinforcing ribs.

[0008] Furthermore, at least one fixing bracket is provided on both sides of the upper end of the high-position tube, and the rain cap is connected to the fixing bracket by fastening bolts.

[0009] Furthermore, the fixing bracket is a conical shell structure, and the fixing bracket and the high-position tube are an integral structure.

[0010] Furthermore, the air filter assembly also includes a mounting bracket, with both sides of the pre-filter connected to the mounting bracket via support brackets, and the other side of the mounting bracket is also provided with a connecting bracket for connecting the air filter assembly to the vehicle.

[0011] Furthermore, the lower end of the high-position tube is inserted into the rubber tube, and the upper end of the high-position tube is connected to the fixing frame through multiple connecting ears.

[0012] Furthermore, the top surfaces of both the first and second reinforcing columns are arc-shaped, and the second reinforcing column is located at the lower end face of the high-position tube.

[0013] Furthermore, a dust discharge shell is detachably installed at the bottom of the pre-filter. The bottom of the dust discharge shell has a conical structure, and a dust discharge valve is installed at the bottom of the dust discharge shell.

[0014] Furthermore, the bottom of the pre-filter is equipped with multiple mounting brackets, and the dust discharge shell is connected to the mounting brackets by multiple fastening bolts.

[0015] Furthermore, a protective valve is provided around the dust discharge valve, and the structure of the protective valve is the same as that of the dust discharge valve.

[0016] Beneficial effects

[0017] Compared with the prior art, this utility model has the following advantages:

[0018] The air filter assembly of this utility model has a flat structure for its air intake pipe, which can greatly increase the air intake area. At the same time, a reinforcing column is added inside the air intake pipe to effectively ensure the structural strength of the air intake pipe. The air intake pipe is connected by a split rubber hose and a high-position pipe. A flexible rubber hose is used to connect the high-position pipe to the pre-filter. The flexible connection method can greatly reduce the impact of vibration on the connection point, and can improve the connection reliability and structural strength of the air intake pipe at the same time, thereby ensuring the service life and air intake efficiency of the air filter assembly. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of one side of the present invention;

[0020] Figure 2 This is a three-dimensional structural diagram of the other side of the present invention;

[0021] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0022] Figure 4 for Figure 3 Enlarged cross-sectional view of point A in the middle;

[0023] Figure 5 This is a bottom-view three-dimensional structural diagram of the present invention after removing the dust exhaust shell;

[0024] Figure 6 This is an enlarged three-dimensional structural diagram of the rubber tube in this utility model;

[0025] Figure 7 This is an enlarged three-dimensional structural diagram of the high-position tube in this utility model.

[0026] The components are: 1-Pre-filter, 2-Main filter, 3-Inlet pipe, 4-Rain cap, 5-Protective valve, 6-Fixed bracket, 7-Support bracket, 8-Connecting bracket, 9-Dust exhaust shell, 10-Dust exhaust valve, 11-Mounting bracket, 31-Hose, 32-High-position pipe, 33-First reinforcing column, 34-Second reinforcing column, 35-Cross reinforcing rib, 36-Annular reinforcing rib, 37-Diagonal reinforcing rib, 38-Fixed latch, 39-Connecting ear. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0028] See Figure 1-7This utility model discloses an air filter assembly, comprising a pre-filter 1 and a main filter 2. The pre-filter 1 is used for coarse filtration of large particulate matter, and the main filter 2 is used for fine filtration of fine particulate matter. The air inlet of the pre-filter 1 is connected to an air inlet pipe 3. The main filter 2 is installed on top of the pre-filter 1, and the air outlet of the pre-filter 1 is connected to the air inlet of the main filter 2, achieving two-stage filtration and effectively ensuring the filtration effect. The air inlet pipe 3 has a flat structure; specifically, its cross-section is an elongated shape, which effectively increases the air intake area compared to a circular pipe structure. The air inlet pipe 3 includes a separate rubber hose 31 and a high-position pipe 32. The rubber hose 31 is a curved pipe made of soft rubber, and the high-position pipe 32 is a straight pipe made of metal or hard plastic. One end of the rubber hose 31 is fixedly connected to the air inlet of the pre-filter 1, and the other end is detachably connected to the high-position pipe 32. This separate air inlet pipe design facilitates disassembly and maintenance. The high-position pipe 32 is arranged vertically and extends above the main filter 2. A rain cap 4 can be detachably installed at the end of the high-position pipe 32 away from the hose 31 to prevent rainwater from entering with the air. A first reinforcing column 33 is provided inside the hose 31 to connect its two side walls, which can effectively improve the structural strength of the hose 31. A second reinforcing column 34 is provided inside the high-position pipe 32 to connect its two side walls, which can effectively improve the structural strength of the high-position pipe 32. The first reinforcing column 33 and the second reinforcing column 34 are staggered, which makes the structural strength of the entire air intake pipe 3 better. At the same time, the staggered reinforcing columns can effectively intercept some flocculent matter.

[0029] The air filter assembly of this utility model has a flat structure for its air intake pipe 3, which can greatly increase the air intake area. At the same time, a reinforcing column is added inside the air intake pipe 3 to effectively ensure the structural strength of the air intake pipe 3. The air intake pipe 3 is connected by a split rubber hose 31 and a high-position pipe 32. A flexible rubber hose is used to connect the high-position pipe to the pre-filter. The flexible connection method can greatly reduce the impact of vibration on the connection, and can improve the connection reliability and structural strength of the air intake pipe at the same time, thereby ensuring the service life and air intake efficiency of the air filter assembly.

[0030] Preferably, the outer wall of the hose 31 is provided with longitudinal and annular cross reinforcing ribs 35, and the outer walls of the upper and lower ends of the high-position tube 32 are provided with annular reinforcing ribs 36. The outer wall of the middle part of the high-position tube 32 between the annular reinforcing ribs 36 is also provided with oblique cross reinforcing ribs 37, which can further improve the structural strength of the air intake tube 3.

[0031] Preferably, at least one fixing bracket 38 is provided on both sides of the upper end of the high-position tube 32, and the rain cap 4 is connected to the fixing bracket 38 by fastening bolts, so as to realize the detachable installation of the rain cap 4. Furthermore, the fixing bracket 38 is a conical shell structure, which effectively reduces the weight of the high-position tube 32, and the fixing bracket 38 and the high-position tube 32 are an integral structure, which further improves the structural strength of the high-position tube 32.

[0032] Preferably, the air filter assembly also includes a mounting bracket 6, wherein the two sides of the pre-filter 1 are connected to the mounting bracket 6 via a support bracket 7 to achieve fixed installation of the pre-filter 1. On the other side of the mounting bracket 6, a connecting bracket 8 is provided for connecting the air filter assembly to the vehicle, so as to install the air filter assembly on the vehicle.

[0033] Preferably, the lower end of the high-position tube 32 is inserted into the rubber tube 31, and the upper end of the high-position tube 32 is connected to the fixing frame 6 through multiple connecting ears 39, so that the high-position tube 32 can be detachably installed in the rubber tube 31, and the installation stability of the entire air intake tube 3 can be improved.

[0034] Preferably, the top surfaces of the first reinforcing column 33 and the second reinforcing column 34 are both arc-shaped to reduce airflow resistance, and the second reinforcing column 34 is located at the lower end face of the high-position tube 32 to avoid deformation at that point.

[0035] Preferably, a dust discharge shell 9 is detachably installed at the bottom of the pre-filter 1. The bottom of the dust discharge shell 9 has a conical structure. The dust separated by the pre-filter 1 can be collected in the dust discharge shell 9 for subsequent discharge. A dust discharge valve 10 is installed at the bottom of the dust discharge shell 9. The dust discharge valve 10 is a product of the prior art. It is usually made of rubber and has a dust discharge nozzle at the bottom. The dust discharge nozzle is normally closed. When subjected to an impact, the dust discharge nozzle 3 can be opened to achieve dust discharge.

[0036] Preferably, multiple mounting brackets 11 are provided at the bottom of the pre-filter 1, and the dust discharge shell 9 is connected to the mounting brackets 11 by multiple fastening bolts. The mounting brackets 11 are provided at the bottom of the pre-filter 1, which can not only improve the structural strength of the pre-filter 1, but also facilitate the fixed installation of the dust discharge shell 9.

[0037] Preferably, a protective valve 5 is provided around the dust discharge valve 10, and the structure of the protective valve 5 is the same as that of the dust discharge valve 10. The size of the protective valve 5 is larger than that of the dust discharge valve 10 so that the protective valve 5 can be fitted around the dust discharge valve 10. After prolonged use, the dust discharge nozzle of the dust discharge valve 10 is prone to damage, causing it to fail to maintain a normally closed state and thus resulting in failure. In this embodiment, a protective valve 5 with the same structure as the dust discharge valve 10 is used to protect the dust discharge valve 10. The double-layer dust discharge valve design makes the dust discharge valve 10 less susceptible to corrosion and impact damage, effectively extending the service life of the automatic cleaning device, while improving the airtightness of the filter device.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. An air filter assembly comprising a pre-filter (1) and a main filter (2), wherein the air inlet of the pre-filter (1) is connected to an air inlet pipe (3), the main filter (2) is mounted on top of the pre-filter (1), and the air outlet of the pre-filter (1) is connected to the air inlet of the main filter (2), characterized in that, The air intake pipe (3) has a flat structure and includes a separate rubber hose (31) and a high-position pipe (32). The rubber hose (31) is a bent pipe, and one end of the rubber hose (31) is fixedly connected to the air inlet of the pre-filter (1), while the other end is detachably connected to the high-position pipe (32). The high-position pipe (32) is arranged vertically and extends above the main filter (2). A rain cap (4) can be detachably installed on the end of the high-position pipe (32) away from the rubber hose (31). The rubber hose (31) is provided with a first reinforcing column (33) that connects its two side walls, and the high-position pipe (32) is provided with a second reinforcing column (34) that connects its two side walls. The first reinforcing column (33) and the second reinforcing column (34) are arranged in a staggered manner.

2. An air filter assembly according to claim 1, characterized in that, The outer wall of the hose (31) is provided with longitudinal and annular cross reinforcing ribs (35), and the outer walls of the upper and lower ends of the high tube (32) are provided with annular reinforcing ribs (36). The outer wall of the middle part of the high tube (32) between the annular reinforcing ribs (36) is also provided with oblique cross reinforcing ribs (37).

3. An air filter assembly according to claim 1, characterized in that, At least one fixing bracket (38) is provided on both sides of the upper end of the high-position tube (32), and the rain cap (4) is connected to the fixing bracket (38) by fastening bolts.

4. An air filter assembly according to claim 3, characterized in that, The fixing bracket (38) is a conical shell structure, and the fixing bracket (38) and the high-position tube (32) are an integral structure.

5. An air filter assembly according to claim 1, characterized in that, The air filter assembly also includes a mounting bracket (6), and the two sides of the pre-filter (1) are connected to the mounting bracket (6) via a support bracket (7). The other side of the mounting bracket (6) is also provided with a connecting bracket (8) for connecting the air filter assembly to the vehicle.

6. An air filter assembly according to claim 5, characterized in that, The lower end of the high-position tube (32) is inserted into the rubber tube (31), and the upper end of the high-position tube (32) is connected to the fixing frame (6) through multiple connecting ears (39).

7. An air filter assembly according to claim 1, characterized in that, The top surfaces of the first reinforcing column (33) and the second reinforcing column (34) are both arc-shaped, and the second reinforcing column (34) is located at the lower end face of the high-position tube (32).

8. An air filter assembly according to any one of claims 1-7, characterized in that, The bottom of the pre-filter (1) is detachably fitted with a dust discharge shell (9), the bottom of which is a cone-shaped structure, and a dust discharge valve (10) is installed at the bottom of the dust discharge shell (9).

9. An air filter assembly according to claim 8, characterized in that, The bottom of the pre-filter (1) is provided with multiple mounting brackets (11), and the dust discharge shell (9) is connected to the mounting brackets (11) by multiple fastening bolts.

10. An air filter assembly according to claim 8, characterized in that, The dust discharge valve (10) is surrounded by a protective valve (5), and the structure of the protective valve (5) is the same as that of the dust discharge valve (10).

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