An intake end cover assembly, an air filter, and a tractor

Abstract

This utility model relates to the field of air filtration equipment technology, specifically to an air intake end cover assembly, an air filter, and a tractor. The air intake end cover assembly includes a front cover, cyclone tubes, guide members, a guide pipe, an ejector dust extraction pipe, and a rear cover. Multiple cyclone tubes are on the front cover; the guide members are inside the cyclone tubes; one end of the guide pipe is inserted into the air outlet of the cyclone tube, and the other end faces the air outlet of the rear cover; the front cover and rear cover are detachably connected, forming a filter chamber inside; one end of the ejector dust extraction pipe is inside the filter chamber, and the other end extends through the rear cover and connects to a negative pressure device; the front cover, cyclone tubes, guide members, guide pipe, and ejector dust extraction pipe are fixed together to form a filter module. The air filter includes a negative pressure system and the air intake end cover assembly; the negative pressure system is connected to the ejector dust extraction pipe. This utility model can separate dust from the intake air, reducing the burden and maintenance frequency of the air filter, and facilitating the maintenance of the air intake end cover.

Description

Technical Field

[0001] This utility model relates to the field of air filtration equipment technology, specifically to an air intake end cover assembly, an air filter, and a tractor. Background Technology

[0002] Tractors play a vital role in agricultural production, and their working environment is often harsh, frequently encountering high dust levels, numerous debris, and humidity. In such environments, the air filtration system is crucial for protecting the engine's normal operation.

[0003] Traditional tractor air intake systems have many problems. For example, external air filters and pre-filters are easily affected by the external environment (rain and dust), occupy external space of the tractor, affect the visibility of the whole machine, and have a low level of protection. Although internal air filters and external pre-filters place the air filter inside the hood, the pre-filter is still exposed, making maintenance inconvenient and requiring openings in the hood, which affects the aesthetics of the whole vehicle. While internal air filters and internal intake end caps place both inside the hood, the existing intake end cap components are just simple shells and cannot play a pre-filtering role. Moreover, the integrated design is difficult to adapt to multiple models. Utility Model Content

[0004] The purpose of this utility model is to provide an air intake end cover assembly, an air filter, and a tractor, which can solve the above-mentioned technical problems.

[0005] In a first aspect, this utility model provides an air intake end cover assembly, including a front end cover, a swirl tube, a guide member, a guide tube, an ejector dust exhaust tube, and a rear end cover; Multiple cyclone tube arrays are disposed on the front end cover, connecting the interior and exterior of the front end cover; The guide component is disposed inside the swirl tube, which enables the incoming air to generate a swirling flow; One end of the guide tube is inserted into the air outlet of the vortex tube, and the other end of the guide tube faces the air outlet of the rear cover. The front cover and the rear cover are detachably connected, forming a filter chamber inside; One end of the ejector dust pipe is located inside the filter chamber, and the other end extends through the rear end cover to connect to the negative pressure device. The front cover, the cyclone tube, the guide member, the guide tube, and the ejector dust exhaust tube are fixedly connected together to form a filter module.

[0006] In an optional embodiment, the guide includes a central post and multiple helical blades; The plurality of the spiral blades are arranged in a ring around the sidewall of the central column.

[0007] In an optional embodiment, both the swirl tube and the guide tube are tapered tubes; The outer contour of the guide is tapered.

[0008] In an optional embodiment, the front end cover and the rear end cover are sealed together.

[0009] In an optional embodiment, the cyclone tube is integrally formed with the guide member.

[0010] In an optional embodiment, a plurality of dustproof holes are provided below the air inlet of the front cover.

[0011] Secondly, this utility model provides an air filter, including a negative pressure system and an air inlet end cap assembly as described in any of the foregoing embodiments; The negative pressure system is connected to the ejector dust extraction pipe.

[0012] In an optional implementation, the negative pressure system includes a dust extraction bowl and a suction fan; The ejector dust extraction pipe is connected to the interior of the dust extraction bowl; The suction fan is located at the opening of the dust collection bowl, which enables a continuous negative pressure to be formed inside the dust collection bowl.

[0013] In an optional embodiment, the ejector dust pipe is connected to the dust discharge bowl via a flexible rubber tube.

[0014] Thirdly, this utility model provides a tractor that includes the air filter described in any of the foregoing embodiments.

[0015] The beneficial effects of this utility model embodiment are: The combination of the cyclone tube and guide components can efficiently separate dust from the intake air, significantly reducing the burden on the air filter and the frequency of maintenance. The detachable connection structure of the front and rear covers facilitates the maintenance of the intake end cover. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A top view of the front cover of the air intake end cover assembly provided in an embodiment of this utility model; Figure 2 for Figure 1 AA section view; Figure 3 An exploded view of the air intake end cap assembly provided in an embodiment of this utility model; Figure 4 A front view of the swirl tube of the air intake end cap assembly provided in an embodiment of this utility model; Figure 5 A side view of the swirl tube of the air intake end cap assembly provided in an embodiment of this utility model; Figure 6 A three-dimensional structural schematic diagram of the swirl tube of the air intake end cap assembly provided in an embodiment of this utility model; Figure 7 A front view of the guide component of the air intake end cap assembly provided in an embodiment of this utility model; Figure 8 A side view of the guide member of the air intake end cap assembly provided in an embodiment of this utility model; Figure 9 A three-dimensional structural schematic diagram of the guide component of the air intake end cap assembly provided in an embodiment of this utility model; Figure 10 A front view of the guide tube of the air intake end cap assembly provided in an embodiment of this utility model; Figure 11 A side view of the guide tube of the air intake end cap assembly provided in an embodiment of this utility model; Figure 12 A three-dimensional structural schematic diagram of the guide tube of the air intake end cap assembly provided in an embodiment of this utility model; Figure 13 A partial structural schematic diagram of the air filter in the air intake end cap assembly provided in this embodiment of the utility model; Figure 14 A side view of a portion of the structure of the air filter in the air intake end cap assembly provided in an embodiment of this utility model; Figure 15 for Figure 14 Internal structure diagram; Figure 16 for Figure 14 A schematic diagram of the three-dimensional structure.

[0018] Icons: 1-Front end cover; 2-Swirl tube; 3-Dustproof hole; 4-Fixing ear; 5-Guide component; 6-Guide tube; 7-Base plate; 8-Filter chamber; 9-Ejector dust discharge tube; 10-Sealing plate; 11-Rear end cover; 12-Center column; 13-Spiral blade; 14-Soft rubber tube; 15-Dust discharge bowl; 16-Suction fan. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following is combined Figures 1-16 The following describes some embodiments of the present invention in detail. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] In a first aspect, this utility model provides an air inlet end cap assembly, including a front end cap 1, a swirling tube 2, a guide member 5, a guide pipe 6, an ejector dust extraction pipe 9, and a rear end cap 11; a plurality of the swirling tubes 2 are arrayed on the front end cap 1, connecting the interior and exterior of the front end cap 1; the guide member 5 is disposed inside the swirling tube 2, enabling the incoming air to generate swirling flow; one end of the guide pipe 6 is inserted into the air outlet of the swirling tube 2, and the other end of the guide pipe 6 faces the air outlet of the rear end cap 11; the front end cap 1 and the rear end cap 11 are detachably connected, forming a filter chamber 8 inside; one end of the ejector dust extraction pipe 9 is disposed inside the filter chamber 8, and the other end extends through the rear end cap 11 for connecting to a negative pressure device; the front end cap 1, the swirling tube 2, the guide member 5, the guide pipe 6, and the ejector dust extraction pipe 9 are fixedly connected together to form a filter module.

[0027] In this embodiment, the air inlet end cover assembly consists of a front cover 1, swirling tubes 2, guide members 5, guide pipes 6, ejector dust removal pipes 9, and a rear cover 11. Multiple swirling tubes 2 are fixed to the front cover 1 in an array, such as a rectangular or circular array, with both ends penetrating the inner and outer sides of the front cover 1 to form an air intake channel; or the front cover 1 has multiple air inlets, each with a swirling tube 2 at its intake end, the swirling tubes 2 and the air inlets together forming an air intake channel.

[0028] Specifically, in this embodiment, the guide 5 is located inside the swirl tube 2 and is fixedly arranged coaxially with the swirl tube 2. One end of the guide tube 6 is fixed to the air outlet of the air inlet channel by an insertion connection, and the other end extends to the air outlet of the rear cover 11, forming an airflow guiding path.

[0029] More specifically, in this embodiment, the guide 5 and the swirl tube 2 are fixedly connected by being integrally formed.

[0030] The combination of the cyclone tube 2 and the guide 5 transforms the air passing through the air inlet channel into a swirling gas. Centrifugal force is used to throw some of the dust in the air, especially large particles, toward the inner wall of the filter chamber 8, so that they do not enter the guide tube 6, thereby achieving the filtration effect.

[0031] In this embodiment, the front cover 1 and the rear cover 11 are connected by a detachable structure, and after connection, a closed filter chamber 8 is formed inside, in which the filtered dust and other impurities are retained.

[0032] Specifically, there are many ways to make a detachable connection, such as snap-fit, bolt connection, transition fit, interference fit, etc., as long as a detachable connection between the front cover 1 and the rear cover 11 can be achieved.

[0033] In this embodiment, one end of the ejector dust pipe 9 is located at the bottom of the filter chamber 8, and the other end extends outward through the preset through hole of the rear cover 11. The end is provided with an interface for connecting a negative pressure device, which adsorbs and collects the dust inside the filter chamber 8 through negative pressure, thereby performing unified treatment.

[0034] In this embodiment, the guide tubes 6 are arrayed on the substrate 7 and mounted on the front end cover 1 via the substrate 7.

[0035] The connection between the guide tube 6 and the substrate 7 can be an integral part or by welding, as long as the guide tube 6 can be fixedly mounted on the substrate 7.

[0036] In this embodiment, the front cover 1, cyclone tube 2, guide member 5, guide tube 6, and ejector dust extraction tube 9 are integrated into an inseparable filter module through welding, injection molding, or bolt fixing. The filter module can be used with different rear covers 11 and installed in different positions to achieve modular use of the air filter.

[0037] In this embodiment, a fixing lug 4 is provided on the front end cover 1 of the air intake end cover assembly. When installed on the water tank using the fixing lug 4, it is fixed in different dimensions by multiple layers of shock-absorbing rubber pads, reducing direct connection with the engine and lowering the possibility of resonance damage to the assembly. By sharing the front end cover 1 and designing different rear end covers 11, it can adapt to models with different horsepower and different engines, allowing for more flexible air intake layout.

[0038] In this embodiment, the front cover 1 of the air intake end cover assembly is integrated with a visualization window, which makes it easy to observe the degree of blockage inside the end cover, facilitates user maintenance and ensures timely maintenance. Furthermore, the maintenance adopts quick disassembly to ensure timely maintenance.

[0039] In this embodiment, the core function of the air inlet end cap assembly is to perform preliminary filtration and dust separation of the incoming air. Outside air enters the assembly through the swirl tube 2, and is guided by the guide member 5 to form a swirling flow. Centrifugal force is used to throw some of the dust in the air towards the inner wall of the filter chamber 8. The filtered air is then guided by the guide tube 6 to the air outlet of the rear end cap 11, entering the subsequent filtration stage. Dust inside the filter chamber 8 is discharged under negative pressure through the ejector dust exhaust pipe 9, preventing dust accumulation from affecting filtration efficiency. The detachable connection between the front end cap 1 and the rear end cap 11 facilitates cleaning and maintenance of the inside of the filter chamber 8. The air inlet end cap assembly operates on the basis of centrifugal separation technology and closed-chamber filtration. When air enters the cyclone tube 2, the guide 5 changes the airflow direction, causing the airflow to move in a circular motion along the inner wall of the cyclone tube 2, forming a vortex. According to the principle of centrifugal force, dust particles with a density greater than air are thrown towards the inner wall of the cyclone tube 2 by centrifugal force and enter the filter chamber 8 under the push of the airflow. Since the filter chamber 8 is a closed space, the dust particles settle to the bottom of the chamber after losing the airflow carrying force, and are finally discharged under negative pressure through the ejector dust exhaust pipe 9. The guide pipe 6 ensures that clean air flows along a fixed path, avoiding re-mixing with the settled dust. In use, the air inlet end cap assembly is installed on the air inlet end of the air filter. The air outlet of the rear end cap 11 is connected to the main filter unit (such as the filter element) of the air filter, and the protruding end of the ejector dust removal pipe 9 is connected to a negative pressure device (such as a negative pressure pump). Outside air enters through the inlet of the cyclone pipe 2 outside the front end cap 1. After cyclone separation and settling in the filter chamber 8, clean air enters the main filter unit for further filtration through the guide pipe 6 and the air outlet. At the same time, the negative pressure device continues to work, expelling the dust in the filter chamber 8 to the collection device through the ejector dust removal pipe 9. When maintenance is required, the connection structure between the front end cap 1 and the rear end cap 11 can be disassembled to clean the inside of the filter chamber 8. In an optional embodiment, the guide 5 includes a central column 12 and multiple spiral blades 13; the multiple spiral blades 13 are arranged in a ring around the sidewall of the central column 12.

[0040] In this embodiment, the guide member 5 specifically includes a central column 12 and multiple spiral blades 13. The central column 12 is a cylindrical structure, arranged along the axis of the cyclone tube 2, and its length is adapted to the length of the cyclone tube 2. The multiple spiral blades 13 (e.g., 3-6 blades) are arranged uniformly in a ring along the side wall of the central column 12 with the central column as the axis. The edges of the spiral blades 13 abut against or are integrally formed with the inner wall of the cyclone tube 2, and the spiral angles of the spiral blades 13 (e.g., 30°-60°) are consistent, forming a continuous spiral channel. Specifically, in this embodiment, when air enters the swirl tube 2, the spiral blade 13 forces the airflow to flow along the spiral channel, causing the airflow to generate a strong rotational motion. Compared with the ordinary straight plate guide structure, it can significantly improve the rotational speed and centrifugal force of the airflow, thereby separating dust particles in the air more efficiently and improving the efficiency of the initial filtration. In this embodiment, the spiral blade 13 and the central column 12 are integrally formed.

[0041] In an optional embodiment, both the swirl tube 2 and the guide tube 6 are tapered tubes; the outer contour of the guide member 5 is tapered.

[0042] In this embodiment, both the swirl tube 2 and the guide tube 6 are tapered tubes. The diameter of the swirl tube 2 gradually increases along the airflow direction, i.e., the inlet diameter is small and the outlet diameter is large. The diameter of the guide tube 6 also gradually increases along the airflow direction. The outer contour of the guide member 5 is adapted to the tapered inner wall of the swirl tube 2, forming a tapered structure, and its taper is consistent with that of the swirl tube 2. Specifically, in this embodiment, the cyclone tube 2 includes two parts: a straight tube part and a tapered tube part. The straight tube part is at the inlet end of the tapered tube part, and the orifice diameter is the same as the orifice diameter at the inlet end of the tapered tube.

[0043] Specifically, in this embodiment, the guide tube 6 also includes a straight tube portion and a tapered tube portion. The straight tube portion is at the inlet end of the tapered tube, and the diameter of the straight tube portion is the same as the diameter of the inlet end of the tapered tube.

[0044] More specifically, in this embodiment, the taper of the swirl tube 2 and the guide 5 is 8°, and the taper of the guide tube 6 is 17°.

[0045] In this embodiment, the conical design of the swirl tube 2 causes the airflow to swirl and diffuse during the flow process, increasing the turbulence effect and improving the dust separation efficiency; the conical expansion design of the guide tube 6 gradually reduces the airflow velocity, reduces the impact of the airflow on the rear air outlet, and at the same time reduces the wind resistance, ensuring that the airflow smoothly enters the subsequent filtration stage.

[0046] In an optional embodiment, the front cover 1 and the rear cover 11 are sealed together.

[0047] In this embodiment, the front cover 1 and the rear cover 11 are connected by a sealed connection. Specifically, the edge of the front cover 1 is provided with an annular sealing groove, and the corresponding position of the rear cover 11 is provided with an annular protrusion adapted to the sealing groove. A sealing element, such as a rubber sealing ring or a silicone gasket, is placed in the sealing groove. When the front cover 1 and the rear cover 11 are fastened together, the annular protrusion is embedded in the sealing groove, squeezing the sealing element to cause it to elastically deform and fill the gap between them. In addition, the detachable connection structure is evenly distributed on the outside of the sealing structure to ensure that the sealing element is subjected to uniform pressure after fastening. In this embodiment, the sealed connection effectively prevents unfiltered air from directly entering the air outlet. The sealing structure blocks the gap between the front cover 1 and the rear cover 11, ensuring that outside air must pass through the swirl tube 2, filter chamber 8, and guide tube 6 before being discharged from the air outlet. This prevents unfiltered air from directly entering subsequent filter units or the engine, ensuring the reliability of the filtration effect. It should be noted that in this embodiment, the sealing structure can be directly sealed through the sealing end, that is, the mating surface of the front cover 1 and the rear cover 11 is flat, a flat sealing gasket is placed in the middle, and the seal is achieved by tightening with bolts; the sealing element can be changed from a rubber sealing ring to a foamed silicone strip or a metal-coated gasket, as long as it can adapt to the working environment temperature and sealing pressure; the distribution position of the detachable connection structure can be adjusted, as long as the sealing element is subjected to uniform force.

[0048] In an optional embodiment, the swirl tube 2 is integrally formed with the guide member 5.

[0049] In this embodiment, the cyclone tube 2 and the guide member 5 are integrally formed. Specifically, the two are made into an integral structure by injection molding or casting process, and the inner wall of the cyclone tube 2 and the outer contour of the spiral blade 13 are directly integrally formed. This configuration effectively improves the structural stability and airflow continuity between the swirl tube 2 and the guide component 5. Compared to separate connections, the integrated structure eliminates the connection gap and assembly error between the swirl tube 2 and the guide component 5, preventing the formation of vortices in the airflow at the gaps and reducing energy loss. At the same time, it can withstand stronger airflow impacts and vibrations (such as the bumps of a tractor), reducing the risk of the guide component 5 loosening or falling off and extending the service life of the components. It is understood that in this embodiment, the connection between the cyclone tube 2 and the guide 5 is an integral part, but it is not limited to this kind of fixed connection. It can also be other fixed connection methods, such as welding, snap-fit, etc., as long as the connection strength and the smoothness of the airflow channel can be guaranteed.

[0050] In an optional embodiment, a plurality of dustproof holes 3 are provided below the air inlet of the front cover 1.

[0051] In this embodiment, the front cover 1 is a square tube shape, and a sealing plate 10 is provided in the middle of the front cover 1. The swirling tube 2 is provided on the sealing plate 10. The air inlet end of the front cover 1 is wedge-shaped, which allows the air inlet end of the upper swirling tube 2 to be exposed from the front cover 1. Multiple dustproof holes 3 are provided on the cylindrical plate below the air inlet of the front cover 1.

[0052] When air is intake, the gas that does not enter the swirl tube 2 will impact the baffle of the front cover 1, causing the sand and dust to fall and accumulate on the cylinder plate below the air inlet, and then leak out through the dust hole 3, without accumulation.

[0053] Specifically, in this embodiment, the dustproof holes 3 are circular or waist-shaped through holes, arranged in an array.

[0054] Secondly, this utility model provides an air filter, including a negative pressure system and an air inlet end cap assembly as described in any of the foregoing embodiments; the negative pressure system is connected to the ejector dust exhaust pipe 9.

[0055] In this embodiment, the negative pressure system is connected to the ejector dust extraction pipe 9 of the air inlet end cover assembly via a pipeline. One end of the pipeline is sealed to the protruding end of the ejector dust extraction pipe 9, and the other end is connected to the inlet of the negative pressure system. The negative pressure system can employ equipment such as a negative pressure pump or a fan, and its power can be adjusted according to the volume of the filter chamber 8 and the required dust extraction speed.

[0056] Specifically, in this embodiment, the air inlet cap assembly of the air filter performs preliminary filtration (cyclone separation) on the air. The negative pressure system generates negative pressure in the filter chamber 8 through the ejector dust extraction pipe 9, continuously extracting the separated dust and transporting it to the collection device. This prevents dust accumulation in the filter chamber 8 from causing a decrease in filtration efficiency and extends the maintenance cycle of the air filter. At the same time, clean air enters the subsequent main filtration unit (such as a filter element) through the air outlet of the air inlet cap assembly, achieving multi-stage filtration.

[0057] When the negative pressure system is working, a negative pressure environment lower than the air pressure in the filter chamber 8 is generated in the ejector dust extraction pipe 9. According to the principle of fluid pressure difference, the dust in the filter chamber 8 will be drawn into the ejector dust extraction pipe 9 under the action of air pressure difference and enter the collection device of the negative pressure system with the airflow. The swirling separation of the air inlet end cover assembly and the dust discharge of the negative pressure system form a closed loop: the dust generated by the swirling separation is discharged in time by the negative pressure, avoiding secondary mixing with clean air and ensuring stable filtration effect.

[0058] In an optional embodiment, the negative pressure system includes a dust extraction bowl 15 and a suction fan 16; the ejector dust extraction pipe 9 is connected to the interior of the dust extraction bowl 15; the suction fan 16 is located at the opening of the dust extraction bowl 15, enabling a continuous negative pressure to be formed inside the dust extraction bowl 15.

[0059] In this embodiment, the dust extraction bowl 15 has a bowl-shaped structure with an interface on its side that connects to the ejector dust extraction pipe 9. A suction fan 16 is installed at the opening of the dust extraction bowl 15, with its outlet facing outwards. The end of the ejector dust extraction pipe 9 is sealed to the side interface of the dust extraction bowl 15, thus connecting the filter chamber 8 to the interior of the dust extraction bowl 15. The rotation of the suction fan 16 creates a continuous negative pressure within the dust collection bowl 15, efficiently extracting dust from the filter chamber 8. When the suction fan 16 is working, it draws air out of the dust collection bowl 15, causing the air pressure inside the dust collection bowl 15 to be lower than the air pressure in the filter chamber 8, creating a negative pressure difference. Under the action of this pressure difference, dust in the filter chamber 8 flows into the dust collection bowl 15 through the ejector dust collection pipe 9, achieving dust collection and airflow separation. In an optional embodiment, the ejector dust pipe 9 and the dust discharge bowl 15 are connected by a flexible rubber tube 14.

[0060] In this embodiment, the flexible tubing 14 is a tubular structure with a certain degree of elasticity, such as a rubber tube or a silicone tube, and its inner diameter is adapted to the outer diameter of the ejector dust extraction pipe 9 and the outer diameter of the interface of the dust extraction bowl 15. One end of the flexible tubing 14 is fitted onto the protruding end of the ejector dust extraction pipe 9, and the other end is fitted onto the side interface of the dust extraction bowl 15. Both ends are locked with clamps to ensure that the connection is sealed and secure. In this embodiment, a flexible connection between the ejector dust extraction pipe 9 and the dust extraction bowl 15 is achieved through a flexible rubber tube 14. Due to differences in the installation positions of the air inlet end cap assembly and the dust extraction bowl 15 on the equipment, or due to vibrations during equipment operation, the elasticity of the flexible rubber tube 14 can compensate for installation errors and absorb vibrations, preventing the interface from loosening or breaking due to stress caused by vibration in rigid connections (such as rigid pipes). At the same time, the flexibility of the flexible rubber tube 14 facilitates installation and disassembly, reducing maintenance difficulty. It is understood that in this embodiment, a soft rubber tube 14 is used for connection, but other connecting pipes, such as corrugated pipes, can also be used, as long as a flexible and sealed connection between the ejector dust pipe 9 and the dust bowl 15 can be achieved.

[0061] As can be seen from the above, in this utility model, the front cover 1 is composed of a cyclone tube 2, a spiral blade 13 of the guide component 5 inside the cyclone tube 2, and a dust extraction pipe 9 at the bottom of the filter chamber 8. The cyclone tube 2 has a combination of conical and cylindrical shapes. The spiral blade 13 inside the cyclone tube 2 creates a swirling effect. Under the dominance of centrifugal force, components of different densities form internal and external swirling flows. High-density components move downward along the inner wall, while low-density components rise towards the central axis, thus achieving a highly efficient pre-filtration effect. High-density dust particles are drawn away by the negative pressure formed by the dust extraction port at the bottom, thus forming a dust removal effect. Its working process can be divided into the following steps: 1. Tangential feeding: When dust-containing gas enters the cyclone tube 2 at a certain speed and passes through the spiral blade 13, a high-speed rotating flow field is formed, i.e., the cyclone effect. 2. Swirl separation: Under the action of swirling flow, the centrifugal force generated throws dense solid components such as dust particles and water towards the wall and moves downward in a spiral along the inner wall, thus accumulating at the dust discharge nozzle at the bottom. 3. Dust ejection: Dust accumulates at the bottom of the filter chamber 8. Due to the suction of the fan 16, the dust is discharged through the dust ejection tube and the dust discharge bowl 15 into the air intake end cover assembly, thereby increasing its filtration efficiency. The clean filtered air enters the air filter through the guide pipe 6.

[0062] During use, the front of the air intake end cover assembly is the mesh area of ​​the hood, which facilitates air intake and increases its filtration effect. Air containing impurities and dust first enters the vortex tube 2 of the air intake end cover assembly. Under the action of centrifugal force, the dust is thrown against the wall and accumulates in the dust exhaust port area. Due to the negative pressure generated by the suction fan 16, the dust accumulated here is continuously discharged from the air intake end cover assembly, ensuring the overall cleanliness of the air intake end cover assembly and the filtration efficiency of the entire system. The filtration effect comparison is shown in the table below. The continuous dust exhaust will reduce the maintenance frequency of the end cover and the air filter, reducing maintenance costs.

[0063]

[0064] The above operating conditions are divided into four cases. Among them, the first case is the front cover 1 of the prior art, which does not have the swirl tube 2 and the dust ejector function; the second case is the air intake end cover assembly provided in this embodiment, which does not have the dust ejector function; the third case is the air intake end cover provided in this embodiment, with the ejector flow rate being 5% of the air intake flow rate; and the fourth case is the air intake end cover provided in this embodiment, with the ejector flow rate being 10% of the air intake flow rate.

[0065] The experimental conditions were as follows: the test temperature was 25℃, the test time was 30 min, the dust used was 270 mesh quartz sand, and the test flow rate was... .

[0066] Thirdly, this utility model provides a tractor that includes the air filter described in any of the foregoing embodiments.

[0067] The beneficial effects of this utility model embodiment are: The combination of the cyclone tube 2 and the guide 5 can efficiently separate dust in the intake air, significantly reducing the burden on the air filter and the frequency of maintenance. The detachable connection structure of the front cover 1 and the rear cover 11 facilitates the maintenance of the intake end cover.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An air inlet end cap assembly characterized by, It includes a front cover, a cyclone tube, a guide component, a guide tube, an ejector dust extraction tube, and a rear cover; Multiple cyclone tube arrays are disposed on the front end cover, connecting the interior and exterior of the front end cover; The guide component is disposed inside the swirl tube, which enables the incoming air to generate a swirling flow; One end of the guide tube is inserted into the air outlet of the vortex tube, and the other end faces the air outlet of the rear cover; The front cover and the rear cover are detachably connected, forming a filter chamber inside; One end of the ejector dust pipe is located inside the filter chamber, and the other end extends through the rear end cover to connect to the negative pressure device. The front cover, the cyclone tube, the guide member, the guide tube, and the ejector dust exhaust tube are fixedly connected together to form a filter module.

2. The gas inlet end cap assembly of claim 1, wherein, The guide component includes a central column and multiple spiral blades; The plurality of the spiral blades are arranged in a ring around the sidewall of the central column.

3. The air intake end cap assembly according to claim 1, characterized in that, Both the cyclone tube and the guide tube are tapered tubes; The outer contour of the guide is tapered.

4. The gas inlet end cap assembly of claim 1, wherein, The front cover and the rear cover are sealed together.

5. The gas inlet end cap assembly of claim 1, wherein, The cyclone tube and the guide are integrally formed.

6. The gas inlet end cap assembly of claim 1, wherein, Multiple dustproof holes are provided below the air inlet of the front cover.

7. An air filter characterized by, Includes a negative pressure system and the air intake end cap assembly as described in any one of claims 1-6; The negative pressure system is connected to the ejector dust extraction pipe.

8. The air filter of claim 7, wherein, The negative pressure system includes a dust extraction bowl and a suction fan; The ejector dust extraction pipe is connected to the interior of the dust extraction bowl; The suction fan is located at the opening of the dust collection bowl, which enables a continuous negative pressure to be formed inside the dust collection bowl.

9. The air filter of claim 8, wherein, The ejector dust extraction pipe is connected to the dust extraction bowl via a flexible rubber tube.

10. A tractor characterised in that, Includes the air filter as described in any one of claims 7-9.

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