Air filter box of diesel engine

Abstract

The utility model relates to the technical field of diesel engines, in particular to a diesel engine air filter box which comprises an inner shell, a connecting mechanism is arranged on the lower surface of the inner shell, a filter mechanism is arranged in the inner shell, the connecting mechanism comprises a connecting block, a limiting groove and a limiting block, the connecting block is installed on one side of the inner shell, and the limiting block is installed on the other side of the inner shell. The limiting groove is formed in one side of the connecting block, the limiting block is connected to the surface of the inner wall of the limiting groove in a sliding mode, and rapid connection and positioning of the inner shell and the outer shell are achieved through the connecting mechanism by means of sliding fit of the limiting groove in the connecting block and the limiting block. When the outer shell needs to be fixed, the limiting blocks slide into the limiting grooves, stable limiting can be formed on the connecting blocks, relative displacement between the outer shell and the inner shell is avoided, and the sealing performance of shell connection is guaranteed; and meanwhile, the risk of connection looseness caused by vibration is reduced, and the stability of the air filter box in the working environment of an engine is improved.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine technology, and in particular to a diesel engine air filter box. Background Technology

[0002] During the operation of a diesel engine, a large amount of air needs to be drawn in to ensure combustion efficiency. However, if dust, sand, or other impurities in the air enter the cylinder, they will accelerate the wear of the piston assembly and cylinder. Therefore, the air filter box, as a key component for filtering air, directly affects the engine's lifespan. While existing air filter boxes can achieve basic filtration functions, some products have problems with their internal structural design. When air flows through the inside of the air filter box, the flow rate is easily reduced due to structural obstruction, making it difficult to meet the intake air volume required for engine operation, thus affecting engine performance and lifespan.

[0003] Compared to patent document "CN214836779U" regarding a diesel engine air filter box, improvements have been made to address the aforementioned issues. This improvement simplifies the internal structure of the air filter box by bolting the outer and inner shells together to form a sealed box. Outside air is introduced through an intake manifold, filtered by a hollow cylindrical fiber filter element, and then enters the engine combustion chamber through the outlet. Furthermore, this patent employs an installation groove to position the filter element, enhances sealing with sealing gaskets and strips, and facilitates filter element installation and removal through the positioning slot and bracket. This addresses, to some extent, the problems of slow airflow and inconvenient filter element installation and removal.

[0004] However, the aforementioned patented technology generates continuous and high-frequency vibrations during the operation of a diesel engine. These vibrations are transmitted through the engine body to the outer and inner housings of the air filter box. In the prior art, the outer and inner housings are connected only by bolts. Under long-term vibration, the connection surfaces of the bolts and threaded holes will experience slight relative displacement. This displacement gradually weakens the friction between the threads, causing the bolts to loosen. Consequently, unfiltered air from the outside enters the air filter box, accelerating the wear of components such as the piston assembly and cylinders, and severely affecting the engine's service life and operational stability. Summary of the Invention

[0005] The purpose of this utility model is to provide a diesel engine air filter box that solves the problem of unfiltered air entering the air filter box, which aggravates the wear of piston assembly, cylinder and other components, and seriously affects the service life and operational stability of the engine.

[0006] To achieve the above objectives, this utility model provides a diesel engine air filter box, including an inner shell, a connecting mechanism provided on the lower surface of the inner shell, a filtering mechanism provided inside the inner shell, and the connecting mechanism including a connecting block, a limiting groove and a limiting block. The connecting block is installed on one side of the inner shell, the limiting groove is formed on one side of the connecting block, and the limiting block is slidably connected to the inner wall surface of the limiting groove.

[0007] The inner shell is slidably connected to the outer shell on one side, and there are two connecting blocks. The connecting blocks are fixedly installed on both sides of the outer shell, and a connecting plate is fixedly installed on the lower surface of the inner shell.

[0008] The connecting plate has a gear rotatably connected to the bottom of its inner wall, a rotating block rotatably connected to the lower surface of its connecting plate, the rotating block being fixedly connected to the gear, and a rack slidably connected to the bottom of its inner wall.

[0009] The rack consists of two racks, each meshing with a gear. A sliding plate is fixedly mounted on one side of each rack, and the sliding plate is slidably connected to the bottom of the inner wall of the connecting plate.

[0010] The sliding plate has an mounting plate fixedly installed on its upper surface, a spring fixedly installed on one side of the mounting plate, and the other end of the spring fixedly installed on one side of the inner wall of the connecting plate.

[0011] The outer shell has an air inlet on one side, the inner shell has an air inlet pipe fixedly installed on one side, and the inner wall of the inner shell has a connecting ring fixedly installed on one side.

[0012] The inner wall surface of the connecting ring is threaded with a fixing block, a filter element is fixedly installed at one end of the fixing block, and a sealing ring is fixedly installed on the surface of the filter element.

[0013] This utility model discloses a diesel engine air filter box. By setting a connecting mechanism on one side of the inner housing, and utilizing the sliding engagement between the limiting groove on the connecting block and the limiting block, the inner housing and outer housing can be quickly connected and positioned. When it is necessary to fix the outer housing, the limiting block slides into the limiting groove, which can stably limit the connecting block, preventing relative displacement between the outer and inner housings and ensuring the sealing of the housing connection. At the same time, this structure eliminates the need for bolts for fixation, reducing the risk of loosening due to vibration and improving the stability of the air filter box under engine operating conditions. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1This is a schematic diagram of the main appearance of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the outer shell of an embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the connecting plate in an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the inner shell of an embodiment of the present invention.

[0019] Figure 5 This is a schematic diagram of the internal structure of the inner shell of this utility model embodiment.

[0020] Figure 6 This is a schematic diagram of the filter element according to an embodiment of the present invention.

[0021] 1. Inner shell; 2. Connecting mechanism; 201. Connecting plate; 202. Outer shell; 203. Connecting block; 204. Limiting groove; 205. Gear; 206. Rack; 207. Rotating block; 208. Sliding plate; 209. Limiting block; 210. Mounting plate; 211. Spring; 3. Filtering mechanism; 301. Air inlet; 302. Air inlet pipe; 303. Connecting ring; 304. Fixing block; 305. Filter element; 306. Sealing ring. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0023] Please see Figures 1-6 A diesel engine air filter box includes an inner housing 1, a connecting mechanism 2 on the lower surface of the inner housing 1, and a filtering mechanism 3 inside the inner housing 1. The connecting mechanism 2 includes a connecting block 203, a limiting groove 204, and a limiting block 209. The connecting block 203 is installed on one side of the inner housing 1, the limiting groove 204 is formed on one side of the connecting block 203, and the limiting block 209 is slidably connected to the inner wall surface of the limiting groove 204. The sliding of the limiting block 209 within the limiting groove 204 allows for quick connection and separation between the inner housing 1 and the outer housing 202, facilitating maintenance of the air filter box.

[0024] Furthermore, the inner housing 1 is slidably connected to the outer housing 202 on one side. This sliding connection allows the outer housing 202 to move smoothly along the side of the inner housing 1, enabling flexible adjustment of their relative positions according to actual needs, making installation and disassembly more convenient. Two connecting blocks 203 are fixedly installed on both sides of the outer housing 202. This symmetrical installation provides support points for the connection between the outer housing 202 and the inner housing 1 from both sides, effectively ensuring the stability of the connection and avoiding the shaking problem that may occur with a single-point connection. A connecting plate 201 is fixedly installed on the lower surface of the inner housing 1. The connecting plate 201 is made of high-strength metal material, providing a solid mounting foundation for other components of the connecting mechanism 2, such as gears 205 and racks 206, ensuring that these components will not shift position due to force during operation.

[0025] Furthermore, a gear 205 is rotatably connected to the bottom of the inner wall of the connecting plate 201, and a rotating block 207 is rotatably connected to the lower surface of the connecting plate 201. The rotating block 207 is fixedly connected to the gear 205, and a rack 206 is slidably connected to the bottom of the inner wall of the connecting plate 201. Rotating the rotating block 207 can drive the gear 205 to rotate synchronously. The rotation of the gear 205 can drive the rack 206 to slide on the bottom of the inner wall of the connecting plate 201, thereby realizing the transmission of power and providing a power source for the movement of the limit block 209.

[0026] Furthermore, there are two racks 206, each meshing with a gear 205. A sliding plate 208 is fixedly mounted on one side of each rack 206, and the sliding plate 208 is slidably connected to the bottom end of the inner wall of the connecting plate 201. The meshing method between the two racks 206 and the gear 205 allows the two racks 206 to move in opposite directions when the gear 205 rotates, thereby driving the sliding plate 208 to slide on the bottom end of the inner wall of the connecting plate 201, achieving synchronous movement of the limiting block 209.

[0027] Furthermore, a mounting plate 210 is fixedly installed on the upper surface of the sliding plate 208. A spring 211 is fixedly installed on one side of the mounting plate 210, and the other end of the spring 211 is fixedly installed on the inner wall of the connecting plate 201. The elastic force of the spring 211 can generate a certain pushing force on the mounting plate 210, so that the sliding plate 208 maintains a stable position when it is not subjected to other external forces. At the same time, when disassembling, the elastic force of the spring 211 can assist the sliding plate 208 to reset, which facilitates operation.

[0028] Furthermore, an air inlet 301 is provided on one side of the outer casing 202, an air intake pipe 302 is fixedly installed on one side of the inner casing 1, and a connecting ring 303 is fixedly installed on one side of the inner wall of the inner casing 1. The air inlet 301 is used to introduce external air, the air intake pipe 302 is used to deliver filtered air to the engine, and the connecting ring 303 provides a connection base for the installation of the filter element 305, ensuring the stability of the filter element 305 installation.

[0029] Furthermore, a fixing block 304 is threadedly connected to the inner wall surface of the connecting ring 303. A filter element 305 is fixedly installed at one end of the fixing block 304, and a sealing ring 306 is fixedly installed on the surface of the filter element 305. The threaded connection between the fixing block 304 and the connecting ring 303 makes it easy to disassemble and replace the filter element 305. The sealing ring 306 can enhance the sealing between the filter element 305 and the inner housing 1, preventing unfiltered air from entering the engine through gaps.

[0030] Overall workflow: When the device is in use, outside air first enters the air filter box through the air inlet 301 on one side of the outer shell 202. At this time, the air is briefly stored in the annular space formed between the outer shell 202 and the inner shell 1. This storage process buffers the airflow, preventing outside air from directly impacting the filter element 305 and causing excessive local filtration pressure. It also allows the air to diffuse more evenly, preparing for the subsequent filtration process. Under the influence of the air pressure difference, the stored air gradually enters the inner shell 1 and then flows through the filter element 305 installed inside. The filter element 305 is made of high-efficiency filter material, and its porous structure effectively traps dust, particles, impurities, and other harmful substances in the air, allowing only clean air to pass through. It is worth noting that the sealing ring 306 fixedly installed on the surface of the filter element 305 fits tightly against the inner wall of the inner housing 1, thus preventing unfiltered air from flowing directly through the gap between the filter element 305 and the inner housing 1, ensuring that all air entering the inner housing 1 is fully filtered by the filter element 305. The clean air filtered by the filter element 305 gathers in the cavity inside the inner housing 1 and is then stably delivered to the engine's intake system through the intake pipe 302 fixedly installed on one side of the inner housing 1, providing clean air for the engine's combustion process and ensuring the engine's normal operation and service life. After the filter element 305 has been used for a period of time, a large amount of impurities will accumulate inside, reducing its filtration efficiency. At this time, the filter element 305 needs to be replaced. During replacement, the operator only needs to manually rotate the rotating block 207 on the lower surface of the connecting plate 201 in the opposite direction. The rotating block 207 will drive the gear 205 fixedly connected to it to rotate synchronously. Since the two racks 206 mesh with the gear 205 respectively, the rotation of the gear 205 will drive the two racks 206 to move away from each other. The racks 206 will then drive the sliding plate 208, which is fixedly connected to them, to slide at the bottom end of the inner wall of the connecting plate 201. As the sliding plate 208 moves, the limiting block 209 installed on the upper surface of the sliding plate 208 will gradually slide out from the inner wall surface of the limiting groove 204 on one side of the connecting block 203. At this time, the limiting fixation between the outer shell 202 and the inner shell 1 is released, and the operator can easily separate the outer shell 202 from the inner shell 1. After the outer shell 202 is separated from the inner shell 1, the operator can directly contact the filter element 305 inside the inner shell 1. Since the fixing block 304 at one end of the filter element 305 is threadedly connected to the connecting ring 303 on one side of the inner wall of the inner housing 1, the operator only needs to hold the filter element 305 by hand and rotate it to unscrew the fixing block 304 from the inner wall surface of the connecting ring 303, thereby removing the old filter element 305. After removing the old filter element 305, the operator aligns the fixing block 304 at one end of the new filter element 305 with the inner wall of the connecting ring 303, and rotates the filter element 305 in the opposite direction to make the fixing block 304 threadedly connected to the connecting ring 303 and tighten it, ensuring that the filter element 305 is securely installed.Afterwards, the operator aligns the outer shell 202 with the sliding connection position of the inner shell 1, pushes the outer shell 202 to make the two initially join, and then rotates the rotating block 207 in the forward direction. Under the transmission action of the gear 205 and the rack 206, the limiting block 209 will slide back into the limiting groove 204. At the same time, the spring 211 on one side of the mounting plate 210 will be in a stretched state. The rebound force generated by it will make the limiting block 209 fit tightly with the limiting groove 204, thereby stably connecting the outer shell 202 and the inner shell 1, and completing the replacement process of the filter element 305.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A diesel engine air filter box, comprising an inner housing, characterized in that: A connecting mechanism is provided on the lower surface of the inner shell, and a filtering mechanism is provided inside the inner shell. The connecting mechanism includes a connecting block, a limiting groove, and a limiting block. The connecting block is installed on one side of the inner shell, the limiting groove is formed on one side of the connecting block, and the limiting block is slidably connected to the inner wall surface of the limiting groove.

2. The diesel engine air filter box according to claim 1, characterized in that: The inner shell is slidably connected to the outer shell on one side. There are two connecting blocks, which are respectively fixedly installed on both sides of the outer shell. A connecting plate is fixedly installed on the lower surface of the inner shell.

3. A diesel engine air filter box according to claim 2, characterized in that: A gear is rotatably connected to the bottom of the inner wall of the connecting plate, a rotating block is rotatably connected to the lower surface of the connecting plate, the rotating block is fixedly connected to the gear, and a rack is slidably connected to the bottom of the inner wall of the connecting plate.

4. A diesel engine air filter box according to claim 3, characterized in that: There are two racks, each of which meshes with a gear. A sliding plate is fixedly installed on one side of each rack, and the sliding plate is slidably connected to the bottom end of the inner wall of the connecting plate.

5. A diesel engine air filter box according to claim 4, characterized in that: An mounting plate is fixedly installed on the upper surface of the sliding plate, a spring is fixedly installed on one side of the mounting plate, and the other end of the spring is fixedly installed on one side of the inner wall of the connecting plate.

6. A diesel engine air filter box according to claim 2, characterized in that: An air inlet is provided on one side of the outer shell, an air inlet pipe is fixedly installed on one side of the inner shell, and a connecting ring is fixedly installed on one side of the inner wall of the inner shell.

7. A diesel engine air filter box according to claim 6, characterized in that: A fixing block is threaded onto the inner wall surface of the connecting ring, and a filter element is fixedly installed at one end of the fixing block. A sealing ring is fixedly installed on the surface of the filter element.

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