Air filter device of brush cutter

Abstract

The utility model relates to the technical field of air filtering devices, and discloses an air filtering device of a brush cutter, which comprises an air inlet chamber, the rear side of the air inlet chamber is fixedly connected with an air inlet pipe, the front side of the air inlet chamber is provided with an air filtering shell, the rear side of the air inlet pipe is connected with an internal combustion engine, and the outer wall of the air inlet chamber is fixedly connected with a fixing frame. The inner wall of the fixing frame is slidably connected with a limiting rod, one end of the limiting rod is connected with the air filter shell through a clamping assembly, and the air inlet chamber and the air filter shell are connected through a positioning assembly so that the air inlet chamber and the air filter shell can be installed. According to the utility model, the inclined top block is separated by pulling the pull plate, so that the connection between the air filter shell and the air inlet chamber is quickly released, and the replacement and maintenance processes of the air filter element are simplified. Meanwhile, air can flow in conveniently through the air holes in the air filter shell and the outer wall of the air inlet chamber, dust is effectively prevented from entering through the sealing strips and the rubber sealing plates, the sealing performance is ensured and improved, and the service life of the air filter element is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of air filter technology, and in particular to an air filter for a brush cutter. Background Technology

[0002] Brush cutters, widely used in agriculture and landscaping, rely on the stable operation of their internal combustion engines for normal operation. The air filter, acting as the engine's "breathing barrier," plays a crucial role in filtering dust and impurities from the air and protecting the engine's internal precision components. In actual operation, brush cutters often operate in complex environments with high levels of dust and debris; therefore, the performance of the air filter directly affects the engine's lifespan and the equipment's working efficiency.

[0003] Existing brush cutter air filter devices have significant shortcomings in structural design and functionality. Firstly, the connection between the air filter housing and the air intake chamber often uses traditional bolt or snap-fit ​​structures. Disassembly requires tools or repeated snap-fit ​​operations, making the process cumbersome and time-consuming. Especially when the filter element needs frequent cleaning or replacement due to dust accumulation, the complex maintenance steps significantly increase the operator's workload and reduce the equipment's continuous operating capacity. Secondly, traditional sealing structures typically rely solely on a single planar fit, lacking elastic buffering and precise positioning design. Under the high-frequency vibration of brush cutters, gaps easily form at the connection points, allowing unfiltered air carrying dust and impurities to directly enter the engine. This not only affects the filtration effect but also accelerates the wear of engine components such as the cylinder block and pistons, shortening the overall lifespan of the equipment. To address this technical problem, this application proposes an air filter device for brush cutters. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an air filter device for a brush cutter. By pulling a pull plate, the inclined top block detaches, quickly disconnecting the air filter housing from the air intake chamber. This simplifies the replacement and maintenance of the air filter element, saves time and labor costs, and improves operational convenience and efficiency. Simultaneously, the vents on the outer walls of the air filter housing and the air intake chamber facilitate airflow, while the use of sealing strips and rubber sealing plates effectively prevents dust ingress, ensuring airtightness, improving sealing performance, and extending the service life of the air filter element.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An air filter device for a brush cutter includes an air intake chamber, an air intake pipe fixedly connected to the rear side of the air intake chamber, an air filter housing disposed on the front side of the air intake chamber, the rear side of the air intake pipe connected to an internal combustion engine, a fixing frame fixedly connected to the outer wall of the air intake chamber, a limit rod slidably connected to the inner wall of the fixing frame, one end of the limit rod being connected to the air filter housing via a locking assembly, the air intake chamber and the air filter housing being connected via a positioning assembly for installation between the air intake chamber and the air filter housing, the outer walls of the air intake chamber and the air filter housing being connected via a sealing assembly, and an air filter element disposed inside the air intake chamber.

[0007] The engaging assembly includes a second inclined top block fixedly connected to one end of the limiting rod. A sealing plate is fixedly connected to the outer wall of the air filter housing. A first inclined top block is fixedly connected to the rear side of the sealing plate. The second inclined top block is disposed on the outer wall of the first inclined top block. The sealing assembly includes a plug-in housing fixedly connected to the outer wall of the air filter housing and the outer wall of the air intake housing. A sealing groove is provided inside the plug-in housing, and a sealing strip is provided inside the sealing groove.

[0008] Furthermore, a spring is provided on the outer wall of the limiting rod, and a pull plate is fixedly connected to the other end of the limiting rod.

[0009] Furthermore, one end of the spring facing the inclined top block one is connected to the outer wall of the inclined top block two, and the other end of the spring is connected to the inner wall of the fixing frame.

[0010] Furthermore, the positioning component includes a positioning shaft fixedly connected to the rear side of the air filter housing, and a positioning hole is provided on the front side of the air intake chamber, with the positioning shaft disposed inside the positioning hole.

[0011] Furthermore, both the outer walls of the air filter housing and the air inlet chamber are provided with ventilation holes.

[0012] This utility model has the following beneficial effects:

[0013] In this invention, pulling the pull plate causes the limiting rod to slide, compressing the spring and causing the second inclined top block to disengage from the first inclined top block. This quickly disconnects the air filter housing from the air intake chamber, allowing operators to easily remove the air filter housing and then disassemble the air filter element for replacement or maintenance. This greatly simplifies the air filter element replacement and maintenance process, saves time and labor costs, and improves operational convenience and efficiency.

[0014] In this invention, both the outer walls of the air filter housing and the air intake chamber are provided with vents, allowing air to flow smoothly into the air filter for filtration. Simultaneously, by inserting a sealing strip into the two plug-in housings and using a rubber sealing plate to block the connection gap between the air intake chamber and the air filter housing, dust and impurities are effectively prevented from entering the engine through the connection, ensuring the airtightness of the connection between the air intake chamber and the air filter housing. This sealing design not only improves the sealing performance of the air filter device but also extends the service life of the air filter element. Attached Figure Description

[0015] Figure 1 This is a perspective view of an air filter device for a brush cutter according to the present invention.

[0016] Figure 2 for Figure 1 Enlarged view of point A in the image;

[0017] Figure 3 This is a schematic diagram of the air inlet chamber structure of an air filter device for a brush cutter proposed in this utility model.

[0018] Legend:

[0019] 1. Intake chamber; 2. Intake pipe; 3. Air filter housing; 4. Insert housing; 5. Fixing bracket; 6. Sealing plate; 7. Angled top block one; 8. Pull plate; 9. Limiting rod; 10. Angled top block two; 11. Spring; 12. Positioning shaft; 13. Positioning hole; 14. Sealing strip; 15. Air filter element. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figures 1-3This utility model provides an embodiment of an air filter device for a brush cutter, comprising an air intake chamber 1, an air intake pipe 2 fixedly connected to the rear side of the air intake chamber 1, an air filter housing 3 disposed on the front side of the air intake chamber 1, the rear side of the air intake pipe 2 connected to an internal combustion engine, a fixing frame 5 fixedly connected to the outer wall of the air intake chamber 1, a limit rod 9 slidably connected to the inner wall of the fixing frame 5, a second inclined top block 10 fixedly connected to one end of the limit rod 9, a sealing plate 6 fixedly connected to the outer wall of the air filter housing 3, a first inclined top block 7 fixedly connected to the rear side of the sealing plate 6, the second inclined top block 10 disposed on the outer wall of the first inclined top block 7, and a spring 11 disposed on the outer wall of the limit rod 9. The other end of the limiting rod 9 is fixedly connected to the pull plate 8. The end of the spring 11 facing the inclined top block 7 is connected to the outer wall of the inclined top block 10. The other end of the spring 11 is connected to the inner wall of the fixing frame 5. The positioning shaft 12 is fixedly connected to the rear side of the air filter housing 3. The front side of the air intake chamber 1 is provided with a positioning hole 13. The positioning shaft 12 is set inside the positioning hole 13 for installation between the air intake chamber 1 and the air filter housing 3. The plug-in housing 4 is fixedly connected to the outer wall of the air filter housing 3 and the air intake chamber 1. The plug-in housing 4 is provided with a sealing groove inside. The sealing groove is provided with a sealing strip 14 inside. The air filter element 15 is provided inside the air intake chamber 1.

[0022] Specifically, the brush cutter's air filter system mainly includes components such as the intake chamber 1, the air filter housing 3, and the air filter element 15. When the brush cutter is operating, external air first flows into the space between the intake chamber 1 and the air filter housing 3 through the vents on the outer wall of the air filter housing 3. Then, it is filtered by the air filter element 15, removing dust and other impurities from the air, thus providing clean air for the brush cutter's engine and ensuring its normal operation. When the air filter element 15 needs to be replaced or maintained, the operator can pull the pull plate 8. The pull plate 8 causes the limit rod 9 to slide against the inner wall of the fixing frame 5, thereby compressing the spring 11 and disengaging the inclined top block 10 from the inclined top block 7. At this time, the connection between the air filter housing 3 and the intake chamber 1 is released, allowing the operator to easily remove the air filter housing 3 from the front of the intake chamber 1, thus disassembling the air filter element 15. After removing the old air filter element 15, the new air filter element 15 is installed inside the intake chamber 1. After installing the new air filter element 15, the air filter housing 3 is reinstalled on the front side of the intake chamber 1 through the cooperation of the positioning shaft 12 and the positioning hole 13. At this time, the inclined surface of the inclined top block 1 7 and the inclined surface of the inclined top block 2 10 come into contact with each other, pushing the inclined top block 2 10 to drive the limiting rod 9 to slide, further compressing the spring 11. Subsequently, relying on the reset action of the spring 11, the inclined top block 2 10 abuts against the outer wall of the inclined top block 1 7, thereby realizing the quick installation and fixation between the intake chamber 1 and the air filter housing 3. In order to ensure the sealing of the connection between the intake chamber 1 and the air filter housing 3, the plug-in housing 4 between the air filter housing 3 and the intake chamber 1 will fit tightly together. Then, the sealing strip 14 is inserted into the interior of the two plug-in housings 4 to further enhance the sealing effect. In addition, the sealing plate 6 is made of rubber, which can provide good sealing when it blocks the connection gap between the air intake chamber 1 and the air filter housing 3, preventing dust and impurities from entering the engine, ensuring that the brush cutter's air filter can work properly, providing clean air to the engine, and ensuring the efficient operation of the brush cutter.

[0023] Reference Figures 1-3 Both the outer walls of the air filter housing 3 and the air inlet chamber 1 are provided with air vents;

[0024] Specifically, in the brush cutter's air filter system, both the outer walls of the air filter housing 3 and the air intake chamber 1 are designed with vents. During operation, outside air flows into the space between the air filter housing 3 and the air intake chamber 1 through the vents on the outer walls of the air filter housing 3 and the air intake chamber 1. The air is then filtered by the air filter element 15 to remove dust and other impurities, ensuring clean air is provided to the brush cutter's engine and guaranteeing its normal operation.

[0025] Working principle: External air flows into the space between the air intake chamber 1 and the air filter housing 3 through the vent holes on the outer wall of the air filter housing 3. The air filter element 15 filters dust and other particles from the outside. When the air filter element 15 needs to be replaced or maintained, pulling the pull plate 8 causes the limit rod 9 to slide against the inner wall of the fixing frame 5, compressing the spring 11 and causing the inclined top block 10 and inclined top block 7 to separate. Then, the air filter housing 3 is removed from the front of the air intake chamber 1, allowing the air filter element 15 to be disassembled. A new air filter element 15 is then installed inside the air intake chamber 1. The air filter housing 3 is then installed on the front of the air intake chamber 1 using the positioning shaft 12 and the positioning hole 13. The contact between the inclined surfaces of inclined top block 7 and inclined top block 10 causes the limiting rod 9 to slide and compress the spring 11. Finally, the spring 11 returns to its original position, causing the inclined top block 10 to press against the outer wall of inclined top block 7, thus achieving quick installation between the air intake chamber 1 and the air filter housing 3. At this time, the plug-in housing 4 between the air filter housing 3 and the air intake chamber 1 will fit together. Then, the sealing strip 14 is inserted into the interior of the two plug-in housings 4 to ensure the sealing of the connection between the air intake chamber 1 and the air filter housing 3. Since the sealing plate 6 is made of rubber, when the sealing plate 6 blocks the gap between the air intake chamber 1 and the air filter housing 3, it provides a seal.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air cleaner for a brush cutter, characterized by comprising: The system includes an intake chamber (1), an intake pipe (2) fixedly connected to the rear side of the intake chamber (1), an air filter housing (3) provided on the front side of the intake chamber (1), the rear side of the intake pipe (2) connected to the internal combustion engine, a fixing bracket (5) fixedly connected to the outer wall of the intake chamber (1), a limit rod (9) slidably connected to the inner wall of the fixing bracket (5), one end of the limit rod (9) being connected to the air filter housing (3) through a locking assembly, and the intake chamber (1) and the air filter housing (3) being connected through a positioning assembly for positioning the intake chamber (1) and the air filter housing. (3) The air intake chamber (1) and the outer wall of the air filter housing (3) are connected by a sealing assembly, and an air filter element (15) is provided inside the air intake chamber (1). The locking assembly includes a second inclined top block (10) fixedly connected to one end of the limiting rod (9), a sealing plate (6) fixedly connected to the outer wall of the air filter housing (3), a first inclined top block (7) fixedly connected to the rear side of the sealing plate (6), and the second inclined top block (10) disposed on the first inclined top block (7). The outer wall of the sealing assembly includes a plug-in housing (4) fixedly connected to the outer wall of the air filter housing (3) and the air inlet chamber (1). The plug-in housing (4) has a sealing groove inside, and a sealing strip (14) is provided inside the sealing groove.

2. A dust filter for a brush cutter according to claim 1, characterized in that: The outer wall of the limiting rod (9) is provided with a spring (11), and the other end of the limiting rod (9) is fixedly connected to a pull plate (8).

3. A cleaning device for a brush cutter according to claim 2, characterized in that: One end of the spring (11) facing the inclined top block one (7) is connected to the outer wall of the inclined top block two (10), and the other end of the spring (11) is connected to the inner wall of the fixing frame (5).

4. The air cleaner for a brush cutter according to claim 1, wherein: The positioning component includes a positioning shaft (12) fixedly connected to the rear side of the air filter housing (3), and a positioning hole (13) is provided on the front side of the air intake chamber (1), with the positioning shaft (12) located inside the positioning hole (13).

5. The air cleaner for a brush cutter as defined in claim 1, wherein: Both the outer walls of the air filter housing (3) and the air inlet chamber (1) are provided with ventilation holes.

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