Air cleaner duct joint structure and air cleaner

Abstract

The utility model relates to air cleaner technical field, concretely relates to air cleaner pipeline joint structure and air cleaner, the joint structure includes the connecting pipe, the connecting pipe has the interface end for with air cleaner body connection, defines the interface end side as the front side, the connecting pipe inside is arranged sealing assembly, locking assembly and external connection assembly from back to front in proper order, external connection assembly is used for with air cleaner body connection, locking assembly locks in the connecting pipe and the back side abuts sealing assembly, forms the front and back limit to sealing assembly when outside vibration, avoids sealing failure, under the working condition that vehicle driving, engine operation brings sustained vibration, locking assembly can be limited to the location constraint effect to sealing assembly on the axis, reduces the tendency that sealing assembly occurs axial deviation in the connecting pipe inside, solved the technical problem that the joint structure in prior art sealing structure appears gap when sustained vibration, leads to sealing failure.

Description

Technical Field

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

[0002] Air filter pipe connectors are used to connect the air filter body to the intake pipe, serving as a connecting component for the airflow channels between the two, ensuring smooth airflow and reducing the risk of pipe leakage. The connector has a mating end for the air filter body and a plug-in end for the intake pipe. During assembly, the two ends of the connector are respectively fitted onto the air outlet of the filter and the end of the intake pipe. The sealing element fills the gap, preventing unfiltered air from seeping into the intake system through the connection gaps, thus avoiding impurities entering the engine and causing wear. Air filter pipe connectors typically use a detachable connection method, reducing the difficulty of maintenance operations. Damaged connectors and sealing rings can be replaced individually without replacing the entire pipe or filter assembly, effectively controlling future maintenance costs. They are widely applicable to air filtration assembly scenarios such as vehicle intake systems and construction machinery intake assemblies.

[0003] For example, patent document CN219012748U discloses a snap-fit ​​structure for connecting an air filter and an intake pipe. This structure includes an air filter and an intake pipe. The air filter's intake port has a snap-fit ​​protrusion at its tail end, and the intake pipe's end has a connecting sleeve. The connecting sleeve has a snap-fit ​​hole that engages with the snap-fit ​​protrusion, and an opening is provided between the snap-fit ​​hole and the edge of the connecting sleeve. This opening provides elastic deformation allowance for the connecting sleeve, effectively reducing the operating force required for snap-fit ​​engagement and disengagement. This snap-fit ​​structure, while ensuring the sealing and stability of the pipe connection, reduces the difficulty of disassembling and assembling the air filter pipe, reduces wear on components, and effectively improves assembly efficiency and ease of subsequent maintenance.

[0004] However, in actual use, the above-mentioned snap-fit ​​structure still has some shortcomings: during vehicle operation, engine operation and road bumps will continuously bring vibration to the pipe connection part. The mating surface of the snap-fit ​​protrusion and the snap-fit ​​hole is in a state of reciprocating micro-friction for a long time. The mating gap will gradually increase with the use time, the tightness of the snap-fit ​​locking will gradually decrease, and gaps will appear at the sealing interface. Moreover, the gap width will continue to increase with the accumulation of vibration, eventually leading to sealing failure. Utility Model Content

[0005] This utility model provides an air filter pipe joint structure to solve the technical problem that the sealing structure of the joint structure is prone to gaps when continuous vibration occurs, leading to sealing failure in the prior art; the purpose of this utility model is also to provide an air filter using the above-mentioned air filter pipe joint structure.

[0006] To solve the above problems, the air filter pipe joint structure provided by this utility model adopts the following technical solution:

[0007] An air filter pipe joint structure includes a connecting pipe with an interface end for connecting to an air filter body. The side where the interface end is located is defined as the front side. Inside the connecting pipe, a sealing component, a locking component, and an external component are arranged sequentially from back to front. The external component is used to connect to the air filter body. The locking component is locked inside the connecting pipe and its rear side abuts against the sealing component to limit the sealing component in the event of external vibration and prevent seal failure.

[0008] The beneficial effects of the above technical solution are as follows: the sealing component, locking component, and external component are arranged sequentially from back to front along the axial direction of the pipe. The external component is assembled with the air filter body, and the locking component is fixed inside the pipe with its rear end face fitting against the sealing component. Under conditions of continuous vibration caused by vehicle movement and engine operation, the locking component can provide axial restraint to the sealing component, reducing the tendency of the sealing component to shift axially inside the pipe. The fit gap between the seal and the pipe / connecting component is maintained, and the sealing interface of the airflow connection channel remains continuously fitted, reducing the amount of unfiltered air entering the intake system from the pipe connection gap.

[0009] Furthermore, the locking assembly includes an annular base, the inner wall of the connecting pipe has a locking area formed by stop steps arranged at intervals, and the outer periphery of the annular base has a spring arm that retracts into the locking area and then expands outward to abut against the stop step on the front side to achieve locking.

[0010] The beneficial effects of the above technical solution are: the axial movement space of the annular base is completely restricted by the front and rear stop steps, and the locking component will not slide back and forth along the inner wall of the pipe after assembly, thus maintaining the locking and limiting effect on the rear sealing component for a long time.

[0011] Furthermore, the outer periphery of the annular base has a notch extending to the front end face, and the spring arm is arranged in the notch, extending obliquely from back to front and from inside to outside.

[0012] Furthermore, the sealing assembly includes a positioning ring and two sealing rings, which are respectively arranged on the rear and front sides of the positioning ring. The inner circumference of the connecting pipe has a groove for the two sealing rings to be inserted, and the inner wall of the connecting pipe also has a limiting step to support the rear sealing ring. The front sealing ring abuts against the rear end face of the annular base.

[0013] The beneficial effects of the above technical solution are: the two sealing rings can form two independent sealing and barrier structures, the limiting step and locking component clamp the entire sealing component from the front and back of the axial direction, the groove restricts the radial outward expansion of the sealing ring, the radial and axial displacement of the sealing ring inside the pipe is constrained, and the contact area between the sealing element and the inner wall of the pipe will not shrink or shift with vibration.

[0014] Furthermore, the external component includes an annular seat, an extension plate extending from back to front, an outer inclined plate on the outer periphery of the extension plate, and an inner inclined plate on the inner periphery; the outer inclined plate is used to engage with the connecting pipe, and the connecting pipe has a slot for inserting the outer inclined plate; the inner inclined plate is used to engage with a slot on the air filter body to achieve a tight clamping and fixing.

[0015] The beneficial effects of the above technical solution are: by using the insertion and matching of the inner inclined plate and the slot, the alignment and assembly between the connector and the air filter body can be achieved. No additional fasteners are required during the assembly process, and the docking operation between the connector and the air filter body is more convenient.

[0016] Furthermore, both the outer and inner inclined plates are elastic arms, so that the annular seat can be locked and prevented from detaching with the tube body and the air filter body respectively under the elastic restoring force of the outer and inner inclined plates.

[0017] The beneficial effects of the above technical solution are: during the assembly process, the elastic arm is deformed by compression, and after the assembly is completed, it continuously outputs elastic restoring force. The elastic force acts on the inner wall of the pipe slot and the inner wall of the air filter slot respectively, and the snap-fit ​​mating surface maintains a tight contact state for a long time. The small displacement caused by vibration will not directly expand the snap-fit ​​mating gap.

[0018] Furthermore, the front end of the inner inclined plate has an outwardly protruding retaining edge, and the connecting pipe has a retaining groove at the corresponding position, with the retaining edge extending into the retaining groove.

[0019] The beneficial effect of the above technical solution is that the snap-fit ​​between the snap edge and the snap-fit ​​groove further ensures the stability of the connection between the ring seat and the pipe.

[0020] Furthermore, the extension plate includes two opposing first sector plates and two opposing second sector plates; the inner sides of the two first sector plates are provided with the inner inclined plates, and the outer peripheries of the two second sector plates are provided with the outer inclined plates; the central angle corresponding to the first sector plate is larger than that of the second sector plate.

[0021] Furthermore, both of the first sector plates are provided with weight reduction holes; the weight reduction holes are provided with the inner inclined plate facing the front side of the air filter body.

[0022] The beneficial effects of the air filter pipe joint structure provided by this utility model are as follows: the sealing component, locking component, and external component are arranged sequentially along the internal axial direction of the pipe. The locking component is installed inside the pipe and abuts against the sealing component, while the external component connects to the air filter body. When the vehicle is moving or the engine is running and generates continuous vibration, the locking component can apply an axial limiting effect to the sealing component, reducing axial movement of the sealing component, keeping the fit clearance between the seal and the pipe / connecting component stable, and maintaining a tight seal at the pipe connection, thus reducing the occurrence of unfiltered air entering the intake system from pipe gaps. The external component is assembled through a snap-fit ​​structure, which simplifies the connection operation of the air filter body; the circumferentially distributed snap-fit ​​structure can distribute the assembly force, and the weight-reducing structure of the component reduces its own weight, weakening the load transmitted from vibration to the sealing part. In summary, through the above-mentioned design, this utility model effectively solves the technical problem in the prior art where gaps easily appear in the sealing structure of the joint structure when continuous vibration occurs, leading to sealing failure.

[0023] To solve the above problems, the air filter provided by this utility model adopts the following technical solution: An air filter includes an air filter body and an air filter pipe joint structure. The air filter pipe joint structure includes a connecting pipe with an interface end for connecting to the air filter body. The side where the interface end is located is defined as the front side. A sealing component, a locking component, and an external component are arranged sequentially from back to front inside the connecting pipe. The external component is used to connect to the air filter body. The locking component is locked inside the connecting pipe and its rear side abuts against the sealing component to limit the sealing component in the event of external vibration and prevent seal failure.

[0024] The beneficial effects of the above technical solution are as follows: the sealing component, locking component, and external component are arranged sequentially from back to front along the axial direction of the pipe. The external component is assembled with the air filter body, and the locking component is fixed inside the pipe with its rear end face fitting against the sealing component. Under conditions of continuous vibration caused by vehicle movement and engine operation, the locking component can provide axial restraint to the sealing component, reducing the tendency of the sealing component to shift axially inside the pipe. The fit gap between the seal and the pipe / connecting component is maintained, and the sealing interface of the airflow connection channel remains continuously fitted, reducing the amount of unfiltered air entering the intake system from the pipe connection gap.

[0025] Furthermore, the locking assembly includes an annular base, the inner wall of the connecting pipe has a locking area formed by stop steps arranged at intervals, and the outer periphery of the annular base has a spring arm that retracts into the locking area and then expands outward to abut against the stop step on the front side to achieve locking.

[0026] The beneficial effects of the above technical solution are: the axial movement space of the annular base is completely restricted by the front and rear stop steps, and the locking component will not slide back and forth along the inner wall of the pipe after assembly, thus maintaining the locking and limiting effect on the rear sealing component for a long time.

[0027] Furthermore, the outer periphery of the annular base has a notch extending to the front end face, and the spring arm is arranged in the notch, extending obliquely from back to front and from inside to outside.

[0028] Furthermore, the sealing assembly includes a positioning ring and two sealing rings, which are respectively arranged on the rear and front sides of the positioning ring. The inner circumference of the connecting pipe has a groove for the two sealing rings to be inserted, and the inner wall of the connecting pipe also has a limiting step to support the rear sealing ring. The front sealing ring abuts against the rear end face of the annular base.

[0029] The beneficial effects of the above technical solution are: the two sealing rings can form two independent sealing and barrier structures, the limiting step and locking component clamp the entire sealing component from the front and back of the axial direction, the groove restricts the radial outward expansion of the sealing ring, the radial and axial displacement of the sealing ring inside the pipe is constrained, and the contact area between the sealing element and the inner wall of the pipe will not shrink or shift with vibration.

[0030] Furthermore, the external component includes an annular seat, an extension plate extending from back to front, an outer inclined plate on the outer periphery of the extension plate, and an inner inclined plate on the inner periphery; the outer inclined plate is used to engage with the connecting pipe, and the connecting pipe has a slot for inserting the outer inclined plate; the inner inclined plate is used to engage with a slot on the air filter body to achieve a tight clamping and fixing.

[0031] The beneficial effects of the above technical solution are: by using the insertion and matching of the inner inclined plate and the slot, the alignment and assembly between the connector and the air filter body can be achieved. No additional fasteners are required during the assembly process, and the docking operation between the connector and the air filter body is more convenient.

[0032] Furthermore, both the outer and inner inclined plates are elastic arms, so that the annular seat can be locked and prevented from detaching with the tube body and the air filter body respectively under the elastic restoring force of the outer and inner inclined plates.

[0033] The beneficial effects of the above technical solution are: during the assembly process, the elastic arm is deformed by compression, and after the assembly is completed, it continuously outputs elastic restoring force. The elastic force acts on the inner wall of the pipe slot and the inner wall of the air filter slot respectively, and the snap-fit ​​mating surface maintains a tight contact state for a long time. The small displacement caused by vibration will not directly expand the snap-fit ​​mating gap.

[0034] Furthermore, the front end of the inner inclined plate has an outwardly protruding retaining edge, and the connecting pipe has a retaining groove at the corresponding position, with the retaining edge extending into the retaining groove.

[0035] The beneficial effect of the above technical solution is that the snap-fit ​​between the snap edge and the snap-fit ​​groove further ensures the stability of the connection between the ring seat and the pipe.

[0036] Furthermore, the extension plate includes two opposing first sector plates and two opposing second sector plates; the inner sides of the two first sector plates are provided with the inner inclined plates, and the outer peripheries of the two second sector plates are provided with the outer inclined plates; the central angle corresponding to the first sector plate is larger than that of the second sector plate.

[0037] Furthermore, both of the first sector plates are provided with weight reduction holes; the weight reduction holes are provided with the inner inclined plate facing the front side of the air filter body.

[0038] The beneficial effects of the air filter provided by this utility model are as follows: the sealing component, locking component, and external component are arranged sequentially along the internal axial direction of the connecting pipe. The locking component is installed inside the connecting pipe and abuts against the sealing component, while the external component connects to the air filter body. When the vehicle is moving or the engine is running and generates continuous vibration, the locking component can apply an axial limiting effect to the sealing component, reducing axial movement of the sealing component, keeping the fit clearance between the seal and the connecting pipe and the connecting component stable, and maintaining a tight seal at the pipe connection, thus reducing the occurrence of unfiltered air entering the intake system from pipe gaps. The external component is assembled through a snap-fit ​​structure, which simplifies the connection operation of the air filter body; the circumferentially distributed snap-fit ​​structure can distribute the assembly force, and the weight-reducing structure of the component reduces its own weight, weakening the load transmitted from vibration to the sealing part. In summary, through the above-mentioned design, this utility model effectively solves the technical problem in the prior art where gaps easily appear in the sealing structure of the joint structure when continuous vibration occurs, leading to sealing failure. Attached Figure Description

[0039] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein: Figure 1 A three-dimensional schematic diagram of the air filter pipe joint structure provided by this utility model. Figure 1 (Bent pipe type); Figure 2 A three-dimensional schematic diagram of the air filter pipe joint structure provided by this utility model. Figure 2 (Bent pipe type); Figure 3 This is a three-dimensional schematic diagram of the external components of this utility model; Figure 4This is a schematic diagram of the locking component of this utility model; Figure 5 This is a schematic diagram of the sealing assembly of this utility model; Figure 6 This is a cross-sectional view of the air filter pipe joint structure provided by this utility model. Figure 7 This is a schematic diagram of another embodiment (straight pipe type) of the air filter pipe joint structure provided by this utility model.

[0040] Explanation of reference numerals in the attached figures: 1. Connector; 2. Interface end; 3. Sealing assembly; 31. Positioning ring; 32. Sealing ring; 4. Locking assembly; 41. Annular base; 42. Spring arm; 43. Notch groove; 5. External assembly; 51. Annular seat; 52. Outer inclined plate; 53. Inner inclined plate; 531. Clamping edge; 54. First sector plate; 55. Second sector plate; 56. Weight reduction hole; 6. Stopping step; 7. Limiting step; 8. Clamping groove; 9. Clamping groove. Detailed Implementation

[0041] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0042] An embodiment of the air filter pipe joint structure provided by this utility model: The air filter pipe joint structure provided in this embodiment is mainly based on the bent pipe type connector 1, such as... Figure 1 , Figure 2 As shown, the front of the connector 1 is the interface end 2 for connecting to the air filter body, as... Figure 6 As shown, the sealing assembly 3, locking assembly 4, and external assembly 5 are sequentially assembled axially from back to front inside the connector 1. The external assembly 5 is used to connect and fix the connector to the air filter body, and the locking assembly 4 is locked to the inner wall of the connector 1 with its rear end face abutting against the sealing assembly 3.

[0043] like Figure 6 As shown, the connector 1 is an integrally formed bent tube-shaped shell, with multiple sets of limiting and positioning structures machined along the axial direction on the inner wall. A limiting step 7 is provided at the rear position of the inner cavity of the connector 1. The limiting step 7 is an inwardly protruding annular step surface, which is used to support the rear end face of the sealing assembly 3 and restrict the sealing assembly 3 from moving backward.

[0044] The location of interface end 2 is defined as the front side. In the middle of the inner cavity of the connector 1, two spaced-ahead stop steps 6 are provided. Both stop steps 6 are annular protrusions extending along the inner circumference of the connector 1, and the annular space between them forms a locking area for the locking component 4 to be inserted. The rear end face of the front stop step 6 is used to engage with the front end of the locking component 4, and the front end face of the rear stop step 6 is used to limit excessive rearward movement of the locking component 4. A radially penetrating groove 8 is provided on the front wall of the connector 1 near interface end 2. Two grooves 8 are symmetrically arranged circumferentially for engaging with the external component 5. An annular concave engagement groove 9 is also provided on the inner wall of the connector 1 in front of the groove 8.

[0045] like Figure 5 As shown, the sealing assembly 3 includes a positioning ring 31 and two sealing rings 32. The two sealing rings 32 are respectively fitted onto the rear and front sides of the positioning ring 31, forming a stacked structure with front and rear double seals. The inner circumference of the connector 1, corresponding to the positions of the two sealing rings 32, has two annular recessed grooves. The outer circumferences of the two sealing rings 32 can be embedded into the corresponding grooves to achieve radial positioning. In other embodiments, the number of sealing rings may not be two, but other numbers, such as two on the inner side and two on the outer side.

[0046] After assembly, the rear end face of the rear sealing ring 32 is attached to the front end face of the limiting step 7, and the front end face of the front sealing ring 32 abuts against the rear end face of the locking component 4. The two sealing rings 32 are distributed back and forth along the axial direction to form two independent sealing barrier structures.

[0047] The limiting step 7 and the locking component 4 clamp the entire sealing component 3 from the axial front and rear directions. The groove simultaneously restricts the radial outward expansion of the sealing ring 32, so that the radial and axial displacement of the sealing ring 32 inside the pipe 1 are effectively constrained.

[0048] like Figure 4 As shown, the locking assembly 4 includes an annular base 41 with multiple notches and slots 43 evenly distributed along its outer periphery. The notches and slots 43 extend rearward from the front end of the annular base 41. Each notch and slot 43 contains multiple spring arms 42, which extend obliquely from rear to front and from inside to outside. The rear end of the spring arm 42 is integrally connected to the bottom of the notch and slot 43, and the front end is a free end, possessing the elastic deformation capability of radially inward contraction and outward rebound.

[0049] During assembly, the locking assembly 4 is pushed backward from the interface end 2 of the connector 1. After the inclined front surface of the spring arm 42 contacts the inner edge of the front stop step 6, it is squeezed inward by the step wall, allowing the entire annular base 41 to pass smoothly through the front stop step 6. After the annular base 41 is fully inside the locking area between the two stop steps 6, the spring arm 42 loses the radial compressive force and springs back outward. The front surface of the spring arm 42 presses against the rear surface of the front stop step 6, while the rear surface of the annular base 41 is limited by the rear stop step 6, thus achieving axial locking of the locking assembly 4 inside the connector 1. After locking, the axial movement space of the annular base 41 is completely restricted by the front and rear stop steps 6. After the locking assembly 4 is assembled, it will not slide back and forth along the inner wall of the connector 1, and can maintain the pressure and limiting effect on the rear sealing assembly 3 for a long time.

[0050] like Figure 3 As shown, the external component 5 includes an annular seat 51, which is a circular base with multiple extension plates extending forward from its front end. Specifically, each extension plate includes two opposing first sector plates 54 and two opposing second sector plates 55. The four sector plates are arranged alternately circumferentially to form an annular insertion structure. The central angle of the first sector plate 54 is larger than that of the second sector plate 55, providing ample space for the inner snap-fit ​​structure. In other embodiments, the extension plate can also be a single annular plate with both inner and outer inclined plates.

[0051] Both first sector plates 54 have weight-reducing holes 56, which are sector-shaped through holes that can reduce the weight of the components themselves.

[0052] Both second sector plates 55 have outer inclined plates 52 on their outer peripheral walls. The outer inclined plates 52 extend from back to front and from inside to outside, forming an elastic arm structure. Both first sector plates 54 have inner inclined plates 53 on their inner peripheral walls and on the front side of the weight reduction holes 56 facing the air filter body. The inner inclined plates 53 extend from front to back and from outside to inside, also forming an elastic arm structure with radial elastic deformation capability. The upper end of the inner inclined plate 53, that is, the outer side of the free end, has an outwardly protruding retaining edge 531.

[0053] When assembling the external component 5, it is pushed backward from the interface end 2 of the connector 1. The outer inclined plate 52 is squeezed inward by the inner wall of the connector 1 until it moves to the position of the slot 8. Then, it loses the radial squeezing force and springs back outward, locking into the slot 8, thus achieving axial locking and fixing of the external component 5 and the connector 1. At the same time, the retaining edge 531 on the outer side of the inner inclined plate 53 extends into the corresponding locking groove 9 of the connector 1 as the inner inclined plate 53 springs back, forming a second locking limit from the inside. This further improves the stability of the connection between the annular seat 51 and the connector 1, preventing the external component 5 from circumferentially deflecting or axially moving due to vibration.

[0054] The inner inclined plate 53 is also used to engage with the slot on the air filter body. When engaging the air filter body, the inner inclined plate 53 is aligned with the slot of the air outlet of the filter and pushed in. The inner inclined plate 53 is squeezed inward by the slot wall and then springs back outward to lock in place. No additional fasteners are required during the assembly process, and the docking operation between the connector and the air filter body is simple.

[0055] like Figure 7 As shown, in another embodiment, the connecting pipe 1 can adopt a straight pipe structure, which also has an interface end 2. The composition, assembly relationship and functional principle of the interface end 2 are consistent with the bent pipe type connector structure. Only the overall shape of the connecting pipe 1 is changed from a bent shape to a straight shape, which can adapt to the needs of different air intake pipeline layouts.

[0056] The working principle of the air filter pipe joint structure provided by this utility model is as follows: When assembling the entire joint structure, first insert the positioning ring 31 with two sealing rings 32 on it from the front side of the pipe 1, so that the rear sealing ring 32 abuts against the limiting step 7 to complete the initial positioning; then push the locking component 4 forward into the locking area between the two stopping steps 6, and rely on the spring arm 42 to complete the axial locking, so that the rear end face of the annular base 41 abuts against the front sealing ring 32, thereby realizing the front and rear clamping and limiting of the sealing component 3; Finally, the external component 5 is installed. The external component 5 is fixed to the connecting pipe 1 by the double engagement of the outer inclined plate 52 with the slot 8 and the locking edge 531 with the locking groove 9. During use, the pipe connection is completed by inserting the inner inclined plate 53 into the slot of the air filter body. Under conditions of continuous vibration caused by vehicle movement and engine operation, the locking component 4 provides a stable axial constraint on the sealing component 3, reducing the tendency of the sealing component 3 to shift axially within the connecting pipe 1. This maintains the fit gap between the sealing ring 32 and the connecting pipe 1 and the mating parts, preventing gaps from appearing at the sealing interface after long-term vibration, which could lead to seal failure.

[0057] An embodiment of the air filter provided by this utility model: An air filter includes an air filter body and an air filter pipe joint structure. The structure and arrangement of the air filter pipe joint structure are exactly the same as those in the above embodiments, and will not be described again here.

[0058] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0059] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. An air filter pipe joint structure, comprising a connecting pipe having an interface end for connection with an air filter body, characterized in that: The side where the interface is located is defined as the front side. Inside the pipe, a sealing component, a locking component, and an external component are arranged sequentially from back to front. The external component is used to connect to the air filter body. The locking component is locked inside the pipe and its rear side abuts against the sealing component to limit the sealing component in the front and rear when there is external vibration, so as to prevent the seal from failing.

2. The air filter pipe joint structure according to claim 1, characterized in that: The locking assembly includes an annular base, the inner wall of the connecting pipe has a locking area formed by front and rear spaced-ahead stop steps, and the outer periphery of the annular base has a spring arm that retracts into the locking area and then expands outward to abut against the front stop step to achieve locking.

3. The air filter pipe joint structure according to claim 2, characterized in that: The outer periphery of the annular base has a notch extending to the front end face, and the spring arm is arranged in the notch, extending obliquely from back to front and from inside to outside.

4. The air filter pipe joint structure according to claim 2 or 3, characterized in that: The sealing assembly includes a positioning ring and two sealing rings, which are respectively arranged on the rear and front sides of the positioning ring. The inner circumference of the connecting pipe has a groove for the two sealing rings to be inserted. The inner wall of the connecting pipe also has a limiting step to support the rear sealing ring. The front sealing ring abuts against the rear end face of the annular base.

5. The air filter pipe joint structure according to any one of claims 1 to 3, characterized in that: The external component includes an annular seat, an extension plate extending from back to front, an outer inclined plate on the outer periphery of the extension plate, and an inner inclined plate on the inner periphery; the outer inclined plate is used to engage with the connecting pipe, and the connecting pipe has a slot for inserting the outer inclined plate; the inner inclined plate is used to engage with a slot on the air filter body to achieve a tight fixation.

6. The air filter pipe joint structure according to claim 5, characterized in that: Both the outer and inner inclined plates are elastic arms, so that the annular seat can be locked and prevented from detaching with the tube body and the air filter body respectively under the elastic restoring force of the outer and inner inclined plates.

7. The air filter pipe joint structure according to claim 5, characterized in that: The front end of the inner inclined plate has an outwardly protruding retaining edge, and the connecting pipe has a retaining groove at the corresponding position, with the retaining edge extending into the retaining groove.

8. The air filter pipe joint structure according to claim 5, characterized in that: The extension plate includes two oppositely arranged first sector plates and two oppositely arranged second sector plates; the inner sides of the two first sector plates are provided with the inner inclined plates, and the outer peripheries of the two second sector plates are provided with the outer inclined plates; the central angle corresponding to the first sector plate is larger than that of the second sector plate.

9. The air filter pipe joint structure according to claim 8, characterized in that: Both of the first sector plates are provided with weight reduction holes; the weight reduction holes are provided with the inner inclined plate facing the front side of the air filter body.

10. An air filter, comprising an air filter body and an air filter pipe joint structure, characterized in that, The air filter pipe joint structure is the air filter pipe joint structure described in any one of claims 1 to 9.

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