An engine air filter

Abstract

The utility model relates to the technical field of engine, disclose an engine air filter, including first casing, second casing and filter unit, filter unit sets up in the containing cavity that first casing, second casing enclose, set up the air inlet on first casing, filter unit with air connection of air inlet, its characterized in that: set up the guide limiting device that is away from filter unit radial guide simultaneously axial location on the side of first casing that is away from air inlet. The utility model can greatly improve installation efficiency, reduce operation difficulty, prolong component service life.

Description

Technical Field

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

[0002] As the core power source of various mechanical equipment, the engine needs to continuously draw in a large amount of air during its operation to ensure complete combustion of fuel. If impurities such as dust and particulate matter in the air directly enter the engine cylinder, they will cause serious wear on key components such as pistons and cylinder walls, significantly shortening the engine's service life. Therefore, as the core filtration component of the engine's intake system, the air filter's filtration performance and ease of installation directly affect the engine's operational reliability and maintenance efficiency.

[0003] Chinese patent document CN211038871U discloses an engine air filter, including an air filter housing with an air filter cover, a filter element assembly disposed inside the air filter housing, an air inlet disposed on the air filter housing, a resonant cavity disposed on the upper end face of the air filter housing, the resonant cavity being connected to the air filter housing via a connecting pipe, an air outlet disposed on the resonant cavity, the resonant cavity including a resonant cavity housing and a resonant cavity cover disposed on one side of the resonant cavity housing, the air outlet being disposed on the lower part of the outer wall of the resonant cavity housing, and a backflow blocking device disposed on the inner wall of the resonant cavity housing corresponding to the air outlet.

[0004] The existing technology has the following shortcomings: Currently, the air filter housing adopts a structure in which the air filter is wrapped by an upper housing and a lower housing. During the replacement and installation process, half of the housing is installed first, then the air filter is installed, and finally the other half of the housing is installed. Since the air filter is installed at a low position on the engine, the engine's own structure and surrounding components affect the installer's line of sight, which makes it impossible to directly install the air filter and the housing into place, thus affecting the installation efficiency. Utility Model Content

[0005] To address the technical problems of air filters being difficult to install quickly and having unreliable seals, this utility model provides an engine air filter, including a first housing, a second housing, and a filter unit. The filter unit is disposed in a receiving cavity formed by the first housing and the second housing. An air inlet is provided on the first housing, and the filter unit is connected to the air inlet for ventilation. The feature is that a guide and limiting device is provided on the first housing on the side away from the air inlet, which guides the filter unit radially and limits its axial movement.

[0006] To facilitate quick positioning and installation, the guide and limiting device includes a guide portion and a limiting portion. The guide portion is arranged radially along the filter unit and guides the filter unit toward the limiting portion. This prevents the operator from tilting the filter unit during assembly.

[0007] In order to ensure that the filter unit is stably installed in the housing, the limiting part includes a first limiting part located in the first housing, and the first limiting part abuts against the filter unit.

[0008] To make the filter unit more stable within the first housing and the second housing, the limiting part includes a second limiting part located in the second housing, which abuts against the filter unit.

[0009] To ensure a more reliable seal and prevent engine damage due to poor sealing, the first limiting part and the second limiting part are positioned opposite each other.

[0010] To better fix and install the filter unit, both the first limiting part and the second limiting part include an axial platform and a radial platform. The axial platform abuts against the end of the filter unit, and the radial platform abuts against the outer wall of the filter unit.

[0011] To better fit the outer wall of the filter unit, the radial platform has an arc-shaped structure.

[0012] Preferably, the filter unit is interference-fitted with the first limiting part and the second limiting part.

[0013] To ensure bidirectional fixation of the filter unit, the filter unit is inserted into the air inlet provided on the first housing with an interference fit, and the first housing simultaneously abuts against the filter unit axially.

[0014] This utility model has the following beneficial effects: 1. Significantly improves installation efficiency and reduces operational difficulty: This utility model sets up a guide and limiting device that integrates radial guidance and axial limiting on the first housing. The guide part has an arc-shaped or gradually closing structure along the radial direction of the filter unit, which can automatically and accurately guide the filter unit during installation. Even in scenarios where the view around the engine is obstructed and the operating space is limited, the operator can quickly guide the filter unit to the preset installation position without repeated alignment and calibration. This effectively solves the problem of installation and positioning difficulties caused by obstructed view in the prior art, significantly shortens the assembly and maintenance time, and reduces the dependence on the operator's skill level.

[0015] 2. Enhanced stability of the filter unit and extended service life: The guide limiting device, through the coordinated operation of the first and second limiting parts, forms a dual axial and radial limit on the filter unit, with the two parts facing each other to ensure uniform force on the filter unit. At the same time, the axial platform of the limiting part abuts against the end of the filter unit, and the arc-shaped radial platform fits against the outer wall of the filter unit, greatly increasing the contact area. Combined with the interference fit design, it completely avoids displacement and shaking of the filter unit due to vibration during engine operation, reduces friction and wear between the filter unit and the housing, extends the service life of the filter unit, and ensures long-term stable filtration performance. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the engine air filter of this utility model; Figure 2 This is a schematic diagram of the first shell. Figure 3 This is a schematic diagram of the second shell. Figure 4 for Figure 1 Radial sectional view; Figure 5 for Figure 1 Axial sectional view. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: first housing 1, second housing 2, filter unit 3, guide and limiting device 4, air inlet 5, guide part 6, limiting part 7, first limiting part 8, second limiting part 9, axial platform 10, and radial platform 11.

[0018] Example 1 like Figure 1-5 As shown, an engine air filter includes a first housing 1, a second housing 2, and a filter unit 3. The filter unit 3 is disposed in a receiving cavity formed by the first housing 1 and the second housing 2. An air inlet 5 is provided on the first housing 1, and the filter unit 3 is ventilatedly connected to the air inlet 5. A guide and limiting device 4 is provided on the first housing 1 on the side away from the air inlet 5 to guide the filter unit 3 radially and limit its axial movement.

[0019] The guide and limiting device 4 includes a guide part 6 and a limiting part 7. The guide part 6 is arranged radially along the filter unit 3 and guides the filter unit 3 toward the limiting part 7. The limiting part 7 axially abuts against the end of the filter unit 3 to prevent the operator from tilting the filter unit 3 during assembly.

[0020] The limiting part 7 includes a first limiting part 8 located in the first housing 1 and a second limiting part 9 located in the second housing 2. The first limiting part 8 and the second limiting part 9 are arranged opposite each other. The first limiting part 8 abuts against the filter unit 3 in the axial and radial directions on the side away from the air inlet 5. The second limiting part 9 abuts against the filter unit 3 in the axial and radial directions on the other side away from the air inlet 5.

[0021] The guide portion 6 has an arc-shaped gradually closing structure. The guide portion 6 is larger in size away from the first limiting portion 8, and its size gradually decreases towards the first limiting portion 8, while its size is smaller closer to the first limiting portion 8. Depending on the actual needs, the guide portion 6 can be a simple arc-shaped structure, a simple gradually closing structure, or a combination of both.

[0022] The first limiting part 8 and the second limiting part 9 both include an axial platform 10 and a radial platform 11. The axial platform 10 abuts against the end of the filter unit 3, and the radial platform 11 abuts against the outer wall of the filter unit 3. The radial platform 11 of the first limiting part 8 and the second limiting part 9 has an arc-shaped structure. The arc-shaped structure has a larger contact area with the filter unit 3 and the force is more uniform.

[0023] The filter unit 3 is interference-fitted with the first limiting part 8 and the second limiting part 9 to prevent the filter unit 3 from shaking inside the housing.

[0024] The filter unit 3 is inserted into the air inlet 5 provided on the first housing 1 with an interference fit, and the first housing 1 is axially abutted against the end of the filter unit 3 near the air inlet 5.

[0025] This utility model provides a guide and limiting device 4 that integrates radial guidance and axial limiting on the first housing 1. The guide part 6 has an arc-shaped gradually closing structure along the radial direction of the filter unit 3, which can automatically and accurately guide the filter unit 3 during installation. Even in scenarios where the view around the engine is obstructed and the operating space is limited, the operator can quickly guide the filter unit 3 to the preset installation position without repeated alignment and calibration.

[0026] Through the multi-layered structure of the housing, guide limiting device 4, and filter unit 3, a tight seal is achieved between the filter unit 3 and the housing and air inlet 5. On the one hand, the interference fit and axial abutment design of the filter unit 3 and air inlet 5 ensure the sealing integrity of the air intake passage; on the other hand, the double limiting and sealing cooperation of the first and second limiting parts 9 effectively blocks the path of unfiltered air seeping in from the installation gap, preventing dust, particulate matter, and other impurities from entering the engine cylinder, protecting the engine's pistons, cylinder walls, and other critical components from the source, reducing the risk of engine failure due to intake air contamination, and improving the engine's operational reliability and overall service life.

[0027] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An engine air filter, comprising a first housing, a second housing, and a filter unit, wherein the filter unit is disposed in a receiving cavity formed by the first housing and the second housing, an air inlet is provided on the first housing, and the filter unit is connected to the air inlet for ventilation, characterized in that: A guide and limiting device is provided on the first housing on the side away from the air inlet to guide the filter unit radially and limit its axial movement.

2. The engine air filter according to claim 1, characterized in that: The guide and limiting device includes a guide part and a limiting part. The guide part is arranged radially along the filter unit and guides the filter unit toward the limiting part.

3. The engine air filter according to claim 2, characterized in that: The limiting part includes a first limiting part located in the first housing, and the first limiting part abuts against the filter unit.

4. The engine air filter according to claim 3, characterized in that: The limiting part includes a second limiting part located in the second housing, and the second limiting part abuts against the filter unit.

5. The engine air filter according to claim 4, characterized in that: The first limiting part and the second limiting part are arranged opposite each other.

6. The engine air filter according to claim 5, characterized in that: Both the first limiting part and the second limiting part include an axial platform and a radial platform. The axial platform abuts against the end of the filter unit, and the radial platform abuts against the outer wall of the filter unit.

7. The engine air filter according to claim 6, characterized in that: The radial platform has an arc-shaped structure.

8. The engine air filter according to claim 7, characterized in that: The filter unit is interference-fitted with the first limiting part and the second limiting part.

9. The engine air filter according to claim 8, characterized in that: The filter unit is inserted into the air inlet provided on the first housing with an interference fit, and the first housing is simultaneously axially abutted against the filter unit.

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