Detachable filter seat structure of filter

Abstract

The utility model discloses a detachable filter seat structure of a filter, which belongs to the technical field of filters and comprises a filter seat, a filter arranged on the filter seat and used for filtering engine oil, a connecting structure arranged on the filter seat and used for installing the filter and a butt joint structure arranged on the filter and used for being in butt joint with the filter seat. A flow guide structure used for changing the flowing direction of engine oil in the filter seat is arranged on the filter seat, and a limiting structure used for reinforcing installation of the filter is arranged on the filter. According to the filter, engine oil can be prevented from excessively leaking from the filter seat in the dismounting process, mounting and dismounting operation is convenient and fast, and meanwhile the situation that the engine oil leaks from the filter seat when the filter is directly dismounted is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter technology field, concretely relates to a filter detachable filter seat structure. BACKGROUND

[0002] The filter is an important part of the engine lubrication system, is used for filtering the impurity in the engine oil, ensures the cleanliness of the engine oil. Mainly divided into engine oil filter, fuel filter, air filter and air conditioner filter and so on type, is responsible for lubrication system, combustion system, air intake system and carriage air circulation system's filtration respectively.

[0003] The utility model discloses a convenient and replaceable oil filter assembly, its oil filter is two and installs in parallel mode at two sides of filter seat respectively, is equipped with valve core in filter seat, has corresponding valve core oil inlet and valve core oil outlet in valve core, has filter seat left oil inlet channel and filter seat right oil inlet channel corresponding with valve core oil inlet, filter seat left oil outlet channel and filter seat right oil outlet channel corresponding with valve core oil outlet in filter seat, filter seat left oil outlet channel and filter seat left oil inlet channel and oil filter on filter seat left side corresponding interface, filter seat right oil outlet channel and filter seat right oil inlet channel and oil filter on filter seat right side corresponding interface. The rotary valve core can make the oil filter of left side (or right side) oil filtration, and the oil filter on the other side can be disassembled and replaced. It is convenient and simple to install and disassemble, and is convenient, time-saving and labor-saving to operate, and reaches the engine of ship, vehicle and does not stop working.

[0004] But the patent above needs to use wrench to adjust the direction of valve core, the operation is more complicated, and if the staff forgets to adjust the direction of valve core, directly removes the filter in use, will cause the excessive leakage of the engine oil in filter seat, has the risk of misoperation. UTILITY MODEL CONTENTS

[0005] In view of the above technical deficiencies, the utility model aims at providing a filter detachable filter seat structure to solve some or all problems in the above background art.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A filter detachable filter seat structure, comprising:

[0008] A filter seat;

[0009] A filter arranged on the filter seat for filtering engine oil;

[0010] An oil inlet pipe and an oil outlet pipe are arranged on the filter seat for engine oil circulation;

[0011] The mounting structure comprises a connecting structure arranged on the filter seat for mounting the filter and a docking structure arranged on the filter for docking with the filter seat.

[0012] The flow guide structure is arranged on the filter seat and cooperates with the mounting structure to change the flow direction of the oil in the filter seat.

[0013] The limiting structure is arranged on the filter to reinforce the mounting of the filter.

[0014] Preferably, the connecting structure is arranged with two groups, and each group of connecting structures comprises:

[0015] The threaded sleeve is arranged on the filter seat.

[0016] The threaded connector is arranged on the inner wall of the filter seat.

[0017] The sealing ring is arranged on the inner wall of the threaded sleeve to increase the sealing performance.

[0018] The oil inlet hole is formed on the inner wall of the filter seat and is in communication with the threaded connector and the oil inlet pipe.

[0019] Preferably, the docking structure comprises:

[0020] The threaded ring is arranged on the filter and is in contact with the sealing ring.

[0021] The filter oil inlet pipe is arranged on one side of the filter.

[0022] The oil outlet hole is formed on the filter.

[0023] The threaded ring is threadedly mounted on the inner wall of the threaded sleeve, the outer surface of the threaded ring is provided with threads matched with the inner wall of the threaded sleeve, the filter oil inlet pipe is threadedly mounted in the threaded connector, and the outer surface of the filter oil inlet pipe is provided with threads matched with the inner wall of the threaded connector.

[0024] Preferably, the flow guide structure comprises an oil inlet flow guide assembly and an oil outlet flow guide assembly.

[0025] The oil inlet flow guide assembly and the oil outlet flow guide assembly are arranged on the filter seat, the oil inlet flow guide assembly is used to guide the oil inlet direction of the oil in the filter seat, and the oil outlet flow guide assembly is used to guide the oil outlet direction of the oil in the filter seat.

[0026] Preferably, the oil inlet flow guide assembly is arranged with two groups, and each group of oil inlet flow guide assemblies comprises:

[0027] The oil outlet through hole is formed on the inner wall of the filter seat and is in communication with the oil outlet pipe.

[0028] The mounting bracket one is arranged on the inner wall of the oil inlet hole.

[0029] a guide rod one is slidably installed on the mounting frame one;

[0030] a rubber sealing sheet one is arranged on the guide rod one, and the rubber sealing sheet one is located in the oil outlet through hole and corresponds to the oil inlet hole;

[0031] an arc contact rod is arranged at one end of the guide rod one and contacts one side of the filter;

[0032] a spring one is sleeved on the guide rod one, and two ends of the spring one are respectively installed on the guide rod one and the mounting frame one, and the spring one is used for driving the movement of the guide rod one to reset;

[0033] The oil outlet through hole is in communication with the oil inlet hole.

[0034] Preferably, the oil outlet guide assembly is arranged with two groups, and each group of the oil outlet guide assembly comprises:

[0035] an oil inlet through hole is formed in the inner wall of the filter seat and is in communication with the oil inlet pipe and the threaded connector pipe;

[0036] a mounting frame two is arranged on the inner wall of the threaded connector pipe;

[0037] a guide rod two is slidably installed on the inner wall of the mounting frame two;

[0038] a rubber sealing sheet two is arranged on the guide rod two, and the rubber sealing sheet two is located in the oil inlet through hole and corresponds to the threaded connector pipe;

[0039] a ring-shaped contact plate is arranged at one end of the guide rod two and contacts one side of the filter oil inlet pipe;

[0040] a spring two is sleeved on the guide rod two, and two ends of the spring two are respectively installed on the mounting frame two and the guide rod two, and the spring two is used for driving the movement of the guide rod two to reset.

[0041] Preferably, the limiting structure comprises:

[0042] a fixing frame is arranged on the filter;

[0043] a screw rod is threadedly installed on the fixing frame;

[0044] a rubber contact block is arranged at one end of the screw rod and contacts the outer surface of the threaded sleeve ring;

[0045] a power assisting assembly is arranged on the fixing frame and is used for assisting in dismounting the filter;

[0046] The inner wall of the fixing frame is provided with a thread matched with the screw rod.

[0047] Preferably, the power assisting assembly comprises a handle rod arranged on the fixing frame and used for holding.

[0048] The filter can be replaced conveniently and quickly, the filter core is not damaged during replacement, and the filter is not damaged during replacement.

[0049] The utility model discloses, when needing to replace the filter, can install the new filter to the idle threaded sleeve first, will extrude the arc resistance rod and annular resistance board of corresponding position respectively during installation, thereby make the filter and oil inlet pipe, oil outlet pipe are in the intercommunication state, make the oil circulation from the filter, then dismantle another filter, the filter will separate the extrusion of arc resistance rod and annular resistance board of corresponding position during dismantling, under the action of spring one and spring two, can make rubber sealing piece one and rubber sealing piece two respectively to the threaded connector and oil inlet hole of this position carry out the plugging, prevent the excessive leakage of oil from the filter seat during the dismantling process, make the filter's dismantle operation convenient and quick, need not utilize spanner to adjust the valve core direction, avoid the situation that the oil leaks from the filter seat when directly dismantling the filter to take place simultaneously.

[0050] The utility model discloses can drive rubber resistance block to press on threaded sleeve through rotating screw after installing the filter, can reinforce the installation of filter, avoid the filter loosening in the process of long -term use, further improved the stability when filter connection.

[0051] The utility model discloses can hold the hand on the holding rod and borrow the force during the process of dismantling the filter, make when dismantling the filter more laborsaving quick. BRIEF DESCRIPTION OF DRAWINGS

[0052] In order to make the technical scheme of the embodiments of the utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0053] Fig. 1 The structure schematic diagram of the detachable filter seat structure of the filter is provided for the embodiments of the utility model;

[0054] Fig. 2 The fixed frame structure schematic diagram of the detachable filter seat structure of the filter is provided for the embodiments of the utility model;

[0055] Fig. 3 The oil outlet through hole and oil inlet through hole sectional structure schematic diagram of the detachable filter seat structure of the filter is provided for the embodiments of the utility model;

[0056] Fig. 4 The sectional structure schematic diagram of the detachable filter seat structure of the filter is provided for the embodiments of the utility model.

[0057] EXPLANATION OF REFERENCE NUMERALS:

[0058] 1. Filter base; 2. Filter; 3. Oil inlet pipe; 4. Oil outlet pipe; 5. Threaded collar; 501. Threaded connector; 502. Sealing ring; 503. Oil inlet hole; 6. Threaded ring; 601. Oil inlet pipe of filter; 602. Oil outlet hole; 7. Oil outlet through hole; 701. Mounting bracket one; 702. Guide rod one; 703. Rubber sealing sheet one; 704. Arc-shaped abutment rod; 705. Spring one; 706. Oil inlet through hole; 707. Mounting bracket two; 708. Guide rod two; 709. Rubber sealing sheet two; 710. Annular abutment plate; 711. Spring two; 8. Fixing bracket; 801. Screw; 802. Rubber abutment block; 803. Handle rod. Detailed Implementation

[0059] 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.

[0060] Example 1:

[0061] like Figs. 1 to 4 As shown, this utility model provides a detachable filter seat structure, including a filter seat 1 for support, a filter 2 arranged on the filter seat 1 for filtering engine oil, and an oil inlet pipe 3 and an oil outlet pipe 4 arranged on the filter seat 1 for supplying engine oil.

[0062] In order to seal the filter seat 1 while removing the filter 2 and prevent oil leakage from the filter seat due to misoperation, an installation structure is provided. The installation structure includes a connecting structure arranged on the filter seat 1 for installing the filter 2 and a docking structure arranged on the filter 2 for docking with the filter seat 1. A flow guide structure is arranged on the filter seat 1 to change the flow direction of the oil in the filter seat 1. The flow guide structure is used in conjunction with the installation structure.

[0063] The connecting structure is arranged with two groups, each group of connecting structure includes a threaded sleeve ring 5 arranged on the filter seat 1, a threaded connector 501 arranged on the inner wall of the filter seat 1, a sealing ring 502 arranged on the inner wall of the threaded sleeve ring 5 for increasing the sealing performance, an oil inlet hole 503 opened on the inner wall of the filter seat 1, the oil inlet hole 503 is respectively communicated with the threaded connector 501 and the oil inlet pipe 3, the two threaded sleeve rings 5 and the two threaded connectors 501 can be used to butt joint two filters 2, one filter 2 can be installed alone during use, when replacement is needed, the filter 2 is installed on the threaded connector 501 on the vacant side, and the other filter 2 is removed, the sealing ring 502 is arranged to increase the sealing effect between the filter 2 and the filter seat 1.

[0064] The butt joint structure includes a threaded ring 6 arranged on the filter 2 and in contact with the sealing ring 502, a filter oil inlet pipe 601 arranged on one side of the filter 2, and an oil outlet hole 602 opened on the filter 2, the threaded ring 6 is screwed on the inner wall of the threaded sleeve ring 5, the outer surface of the threaded ring 6 is provided with threads matched with the inner wall of the threaded sleeve ring 5, the filter oil inlet pipe 601 is screwed in the threaded connector 501, the outer surface of the filter oil inlet pipe 601 is provided with threads matched with the inner wall of the threaded connector 501, during installation, the filter oil inlet pipe 601 on the filter 2 is aligned with the threaded connector 501 and inserted, the filter oil inlet pipe 601 is screwed into the threaded connector 501 while being inserted, and the threaded ring 6 is screwed into the threaded sleeve ring 5.

[0065] The flow guide structure includes an oil inlet flow guide assembly for guiding the oil inlet direction of the oil in the filter seat 1 and an oil outlet flow guide assembly for guiding the oil outlet direction of the oil in the filter seat 1, the oil inlet flow guide assembly and the oil outlet flow guide assembly are arranged on the filter seat 1.

[0066] Specifically, the oil inlet guide assembly is arranged with two groups, each group of oil inlet guide assembly includes an oil outlet through hole 7 which is arranged on the inner wall of the filter seat 1 and is connected with the oil outlet pipe 4, a mounting frame one 701 which is arranged on the inner wall of the oil inlet hole 503, a guide rod one 702 which is slidingly installed on the mounting frame one 701, a rubber sealing sheet one 703 which is arranged on the guide rod one 702 and is located in the oil outlet through hole 7 and corresponds to the oil inlet hole 503, an arc resistance rod 704 which is arranged on one end of the guide rod one 702 and is in contact with one side of the filter 2, a spring one 705 which is sleeved on the guide rod one 702 and is used to drive the movement of the guide rod one 702 for resetting, the two ends of the spring one 705 are respectively installed on the guide rod one 702 and the mounting frame one 701, the oil outlet through hole 7 is connected with the oil inlet hole 503, and the filter 2 can extrude the arc resistance rod 704 when moving, the arc resistance rod 704 is extruded and drives the guide rod one 702 to slide on the mounting frame one 701, and the sliding guide rod one 702 drives the rubber sealing sheet one 703 to separate from the inner wall of the oil outlet through hole 7, at this time, the corresponding position of the oil inlet hole 503 can be opened, so that the oil in the newly installed filter 2 can flow into the oil outlet through hole 7 through the oil inlet hole 503.

[0067] Specifically, the oil outlet guide assembly is arranged with two groups, each group of oil outlet guide assembly includes an oil inlet through hole 706 which is arranged on the inner wall of the filter seat 1 and is connected with the oil inlet pipe 3 and the threaded connector 501, a mounting frame two 707 which is arranged on the inner wall of the threaded connector 501, a guide rod two 708 which is slidingly installed on the inner wall of the mounting frame two 707, a rubber sealing sheet two 709 which is arranged on the guide rod two 708 and is located in the oil inlet through hole 706 and corresponds to the threaded connector 501, an annular resistance plate 710 which is arranged on one end of the guide rod two 708 and is in contact with one side of the filter oil inlet pipe 601, a spring two 711 which is sleeved on the guide rod two 708 and is used to drive the movement of the guide rod two 708 for resetting, the two ends of the spring two 711 are respectively installed on the mounting frame two 707 and the guide rod two 708, the filter oil inlet pipe 601 will extrude the annular resistance plate 710 in the process of being screwed into the threaded connector 501, the annular resistance plate 710 is extruded and drives the guide rod two 708 to slide, and the moving guide rod two 708 stretches the spring two 711 and drives the rubber sealing sheet two 709 to separate from one end of the threaded connector 501, thereby unblocking the threaded connector 501, at this time, the oil can flow into the newly installed filter 2 through the threaded connector 501.

[0068] Example two:

[0069] On the basis of example 1, in order to further improve the stability of the filter 2 during connection, a limiting structure for reinforcing the installation of the filter 2 is arranged on the filter 2.

[0070] The limiting structure comprises a fixing frame 8 arranged on the filter 2, a screw rod 801 threadedly installed on the fixing frame 8, a rubber stopper 802 arranged at one end of the screw rod 801 and in contact with the outer surface of the threaded sleeve 5, and a power-assisted assembly arranged on the fixing frame 8 for assisting in dismounting the filter 2. The inner wall of the fixing frame 8 is provided with a thread matched with the screw rod 801. Rotating the screw rod 801 can make it move by matching with the thread of the inner wall of the fixing frame 8, so that the moving screw rod 801 drives the rubber stopper 802 to abut against the outer surface of the threaded sleeve 5.

[0071] Embodiment Three

[0072] On the basis of Embodiment 2, in order to be more convenient and labor-saving when dismounting the filter 2, the power-assisted assembly is arranged.

[0073] Specifically, the power-assisted assembly comprises a holding rod 803 arranged on the fixing frame 8 for holding. The filter 2 is rotated by holding the holding rod 803, so that it is more convenient and labor-saving when dismounting the filter 2.

[0074] Working principle: when in use, the oil enters the oil inlet hole 706 from the oil inlet pipe 3 on the filter seat 1, and since one of the threaded pipes 501 is blocked by the rubber sealing piece two 709, the oil flows into the filter oil inlet pipe 601 from the other threaded pipe 501, so that the oil enters the filter 2 for filtration, and the filtered oil flows out of the oil outlet hole 602 into one of the oil inlet holes 503, while the other oil inlet hole 503 is blocked by the rubber sealing piece one 703, so that the oil can flow out through the oil outlet pipe 4; when it is necessary to replace the filter 2, first install a filter 2 on the other empty threaded sleeve 5, align the filter oil inlet pipe 601 on the filter 2 with the threaded pipe 501 and insert it while rotating, screw the filter oil inlet pipe 601 into the threaded pipe 501, and in the process, the threaded ring 6 can be screwed into the threaded sleeve 5, and the filter oil inlet pipe 601 will be squeezed into the annular stop plate 710 in the process of being screwed into the threaded pipe 501, and the annular stop plate 710 will be squeezed to drive the guide rod two 708 to slide on the mounting frame two 707, and the moving guide rod two 708 will stretch the spring two 711 and drive the rubber sealing piece two 709 to move, and the rubber sealing piece two 709 will move away from the contact with one end of the threaded pipe 501, thereby unblocking the threaded pipe 501, and at this time, the oil can flow into the newly installed filter 2 through the threaded pipe 501, and at the same time, the movement of the filter 2 can cause it to squeeze the arc-shaped stop rod 704, and the arc-shaped stop rod 704 will be squeezed to drive the guide rod one 702 to slide on the mounting frame one 701, and the sliding guide rod one 702 will stretch the spring one 705 and drive the rubber sealing piece one 703 to move, so that the moving rubber sealing piece one 703 moves away from the contact with the inner wall of the oil outlet hole 7, at this time, the corresponding oil inlet hole 503 can be opened, so that the oil in the newly installed filter 2 can flow into the oil outlet hole 7 through the oil inlet hole 503, and after installation, one side of the threaded ring 6 can be in contact with the sealing ring 502, thereby preventing oil leakage from the connection of the filter 2, and after the new filter 2 is installed, the other filter 2 can be rotated in the opposite direction and removed, and in the process, the removed filter 2 will move in the opposite direction, so that it slowly moves away from the squeezing of the arc-shaped stop rod 704 and the annular stop plate 710, at this time, the spring one 705 and the spring two 711 in the stretched state will respectively pull the guide rod one 702 and the guide rod two 708 to move back to the original position, thereby driving the rubber sealing piece one 703 to reattach to the inner wall of the oil outlet hole 7, blocking the oil inlet hole 503 at this position, and driving the rubber sealing piece two 709 to reset and attach to one end of the threaded pipe 501, thereby blocking the threaded pipe 501 to prevent excessive oil leakage during the removal of the filter 2, at this time, continuous rotation of the filter 2 can cause the filter oil inlet pipe 601 to be unscrewed from the threaded pipe 501, and at the same time, the threaded ring 6 can be unscrewed from the threaded sleeve 5, and the removal is completed.

[0075] After the filter 2 is installed, the screw rod 801 can be rotated, and the screw rod 801 can be moved by cooperating with the screw thread of the inner wall of the fixed frame 8 during rotation, so that the moved screw rod 801 drives the rubber block 802 to abut against the outer surface of the threaded sleeve ring 5, preventing the filter 2 from loosening during use, and when the filter 2 is disassembled, the screw rod 801 can be reversely rotated to cancel the abutment against the threaded sleeve ring 5, at this time, the filter 2 can be rotated by holding the handle 803, so that the filter 2 can be more convenient and labor-saving when disassembled.

[0076] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A detachable filter base structure for an air filter, characterized in that, include: Filter base (1); A filter (2) is arranged on a filter base (1) for filtering engine oil; The oil inlet pipe (3) and the oil outlet pipe (4) are both arranged on the filter seat (1) for supplying oil flow; The mounting structure includes a connection structure arranged on the filter base (1) for mounting the filter (2) and a docking structure arranged on the filter (2) for docking with the filter base (1). A flow guiding structure is arranged on the filter seat (1) and used in conjunction with the mounting structure to change the flow direction of the oil in the filter seat (1); A limiting structure is arranged on the filter (2) to reinforce the installation of the filter (2); The flow guiding structure includes an oil inlet flow guiding component and an oil outlet flow guiding component; The oil inlet guide assembly and the oil outlet guide assembly are both arranged on the filter seat (1). The oil inlet guide assembly is used to guide the oil inlet direction of the filter seat (1), and the oil outlet guide assembly is used to guide the oil outlet direction of the filter seat (1). The oil inlet guide assembly is arranged in two sets, and each set of oil inlet guide assembly includes: An oil outlet hole (7) is formed on the inner wall of the filter seat (1) and connected to the oil outlet pipe (4); Mounting bracket 1 (701) is arranged on the inner wall of the oil inlet (503); Guide rod one (702) is slidably mounted on mounting bracket one (701); Rubber sealing sheet 1 (703) is arranged on guide rod 1 (702). Rubber sealing sheet 1 (703) is located in oil outlet hole (7) and corresponds to oil inlet hole (503); The arc-shaped abutment rod (704) is arranged at one end of the guide rod (702) and contacts one side of the filter (2); Spring 1 (705) is sleeved on guide rod 1 (702). The two ends of spring 1 (705) are respectively installed on guide rod 1 (702) and mounting bracket 1 (701) to drive the movement of guide rod 1 (702) to reset. The oil outlet hole (7) is connected to the oil inlet hole (503).

2. The detachable filter holder structure as described in claim 1, characterized in that, The connection structure is arranged in two sets, and each set of connection structures includes: A threaded collar (5) is arranged on the filter seat (1); A threaded connector (501) is arranged on the inner wall of the filter seat (1); A sealing ring (502) is arranged on the inner wall of the threaded collar (5) to increase the sealing performance; The oil inlet hole (503) is located on the inner wall of the filter seat (1). The oil inlet hole (503) is connected to the threaded connector (501) and the oil inlet pipe (3) respectively.

3. The detachable filter holder structure as described in claim 1, characterized in that, The docking structure includes: A threaded ring (6) is arranged on the filter (2) and in contact with the sealing ring (502); The filter inlet pipe (601) is located on one side of the filter (2); An oil outlet (602) is provided on the filter (2); The threaded ring (6) is threaded on the inner wall of the threaded collar (5), and the outer surface of the threaded ring (6) is provided with a thread that matches the inner wall of the threaded collar (5). The filter inlet pipe (601) is threaded in the threaded connector (501), and the outer surface of the filter inlet pipe (601) is provided with a thread that matches the inner wall of the threaded connector (501).

4. The detachable filter holder structure as described in claim 1, characterized in that, The oil outlet guiding assembly is arranged in two sets, and each set of the oil outlet guiding assembly includes: An oil inlet hole (706) is formed on the inner wall of the filter seat (1) and is connected to the oil inlet pipe (3) and the threaded connector (501); Mounting bracket 2 (707) is arranged on the inner wall of threaded pipe (501); Guide rod two (708) is slidably mounted on the inner wall of mounting bracket two (707); Rubber sealing sheet 2 (709) is arranged on guide rod 2 (708). Rubber sealing sheet 2 (709) is located in oil inlet hole (706) and corresponds to threaded pipe (501); An annular abutment (710) is arranged at one end of the guide rod (708) and in contact with one side of the filter inlet pipe (601); Spring 2 (711) is sleeved on guide rod 2 (708). The two ends of spring 2 (711) are respectively installed on mounting bracket 2 (707) and guide rod 2 (708) to drive the movement of guide rod 2 (708) for reset.

5. The detachable filter base structure of a filter as described in claim 1, characterized in that, The limiting structure includes: A mounting bracket (8) is arranged on the filter (2); The screw (801) is threaded onto the fixing bracket (8); A rubber stop (802) is arranged at one end of the screw (801) and contacts the outer surface of the threaded collar (5); An assist component, arranged on a mounting bracket (8), is used to assist in the disassembly of the filter (2). The inner wall of the fixing frame (8) is provided with a thread that is compatible with the screw (801).

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