Buckle-free air filter

Abstract

The utility model discloses a buckle-free air filter which comprises a filter element, lower covers respectively adhered to two ends of the filter element, and an annular fixing plate I matched with the edge of the upper end face of the filter element in shape, the annular fixing plate I is obliquely arranged, and an annular fixing plate II is arranged along the circumference direction of the annular fixing plate I; a plurality of positioning blocks are arranged on the inner side of the second annular fixing plate, the second annular fixing plate is detachably connected with an end cover, a bending part is arranged on the inner side of the end cover, an inserting groove is formed between the bending part and the end cover and matched with the second annular fixing plate, and a plurality of positioning grooves in interference fit with the positioning blocks are formed in the inserting groove. According to the end cover fixing structure, the end cover can be quickly fixed and installed without a buckle structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of air purification equipment, in particular to a buckle-free air filter. Background Art

[0002] An air filter is a filter mainly used in engineering locomotives, automobiles, agricultural locomotives, etc. The engine needs to inhale a large amount of air during operation. If the air is not filtered, the impurities suspended in the air will be sucked into the cylinder, which will accelerate the wear of the piston group and the cylinder. The air filter can filter out the impurities suspended in the air to protect the engine.

[0003] Air filters are consumables and need to be replaced or cleaned regularly. How to achieve quick disassembly and assembly is very important. In the prior art, such as the Chinese patent document "CN216278214U, an air filter that is easy to disassemble", it includes a filter element, an upper cover plate and a lower cover plate are respectively bonded to both ends of the filter element, the upper cover plate forms an annular fixing plate 2 along the outer circumference, the annular fixing plate 2 is connected to a sealing cover plate through a clamping structure, the sealing cover plate is connected to the external assembly, the clamping structure includes a plurality of arc-shaped protrusions formed on the inner side of the annular fixing plate 2, and a clamping position formed on the outer side of the sealing cover plate, the clamping position can be clamped with the arc-shaped protrusions correspondingly, and the filter element can be quickly disassembled through the clamping structure.

[0004] The above structure is connected by the locking position and the protrusion to achieve rapid disassembly of the filter element. Based on the existing structure, another structure that can achieve rapid disassembly and assembly is proposed, and maintenance is more convenient. Utility Model Content

[0005] The purpose of the utility model is to provide a buckle-free air filter to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A snap-on air filter comprises a filter element, with lower covers bonded to both ends of the filter element respectively, and an annular fixing plate 1 adapted to the edge shape of the upper end face of the filter element, the annular fixing plate 1 being arranged at an angle, and an annular fixing plate 2 being arranged along the circumference of the annular fixing plate, characterized in that a plurality of positioning blocks are arranged on the inner side of the annular fixing plate 2, the annular fixing plate 2 being detachably connected to an end cover, a bending portion is arranged on the inner side of the end cover, a slot is arranged between the bending portion and the end cover, the slot is adapted to the annular fixing plate 2, and a plurality of positioning grooves are arranged on the slot which are interference fit with the plurality of positioning blocks, so that the bending portion squeezes the plurality of positioning blocks inward to form a plurality of extrusion points for fixing.

[0008] Furthermore, the side surface of the end cover is in a "concave" shape, and the end cover includes an inwardly recessed buckle position, an outwardly extending cover ring is provided at one end of the buckle position close to the filter element, and an outwardly extending mating surface is provided at one end of the buckle position away from the cover ring.

[0009] Furthermore, a cross-shaped reinforcing rib is provided on the inner side of the annular fixing plate 1, and the lower end surface of the reinforcing rib is in contact with the filter element.

[0010] Furthermore, a plurality of arc-shaped card slots 1 are symmetrically provided on both sides of the mating surface, and a plurality of arc-shaped card slots 2 corresponding to the plurality of arc-shaped card slots 1 are provided on both sides of the buckle position.

[0011] Furthermore, the arc-shaped slots 1 and 2 are each provided with eight.

[0012] Furthermore, the filter element and the lower cover are clearance-fitted.

[0013] Furthermore, the side wall of the end cover is injected with PU glue for bonding with the external assembly.

[0014] Beneficial effects of the utility model:

[0015] The utility model proposes that the bending part is deformed by adopting the interference fit of a plurality of positioning grooves and a plurality of positioning blocks. During installation, the bending part squeezes the plurality of positioning blocks inward to form a plurality of squeezing points for fixing, thereby ensuring that the end cover is fixedly connected to the annular fixing plate. The fixed installation of the end cover can be quickly completed without the need for a snap-fit ​​structure. During disassembly, since the bending part is deformed, it is necessary to use an external tool to disassemble the end cover.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : The overall structure diagram of the utility model.

[0018] Figure 2 : Explosion diagram of the utility model.

[0019] Figure 3 : A cross-sectional view of the utility model.

[0020] Figure 4 : A bottom stereogram of the end cover of the utility model.

[0021] Figure numerals: 1, filter element; 2, annular fixing plate 1; 5, lower cover; 4, end cover; 3, annular fixing plate 2; 31, positioning block; 21, reinforcing rib; 41, bending portion; 42, slot; 43, buckle position; 44, cover ring; 45, mating surface; 421, positioning groove; 431, arc-shaped slot 1; 451, arc-shaped slot 2. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] Please refer to Figure 1-4 ;

[0024] The air filter described in the utility model is widely used in automobiles, engineering locomotives, laboratories and various environments and equipment that require air purification. The air filter of the utility model has the same working principle as the filters on the market. The filter element 1 is a honeycomb structure, which is composed of many closely arranged small channels or pores. When the air passes through these honeycomb channels, the dust, particulate matter and other pollutants carried in the air will be blocked and remain on the outer surface of the filter medium or embedded in the pores because their size is larger than the honeycomb pores, while the cleaner air can continue to pass through, thereby achieving the purpose of purifying the air.

[0025] The improvement of the present invention lies in that the bending portion 41 is deformed by adopting the interference fit between a plurality of positioning grooves 421 and a plurality of positioning blocks 31. During installation, the bending portion 41 squeezes a plurality of positioning blocks 31 inward to form a plurality of squeezing points for fixing, thereby ensuring that the end cover 4 is fixedly connected to the annular fixing plate 23. No snap-fit ​​structure is required, and the installation of the end cover 4 can be quickly completed by directly inserting it. During disassembly, since the bending portion 41 is deformed, it is necessary to use an external tool to disassemble the end cover 4.

[0026] In this embodiment, the two ends of the filter element 1 are respectively bonded with a lower cover 5 and an annular fixing plate 2 adapted to the shape of the edge of the upper end surface of the filter element 1. The annular fixing plate 2 is tilted, and the major axis length of the bottom of the annular fixing plate 2 is the same as the major axis length of the filter element 1. Usually, the end cover 4 is fixedly connected to an external assembly, such as an air intake pipe of a ventilation device; an annular fixing plate 2 3 is provided along the circumference direction of the annular fixing plate 2, and the annular fixing plate 2 3 is detachably connected to the end cover 4, and a bending portion 41 is provided on the inner side of the end cover 4, and a slot 42 for inserting the annular fixing plate 2 3 is provided between the bending portion 41 and the end cover 4, and the slot 42 is adapted to the annular fixing plate 2 3. When installing the end cover 4, the slot 42 is directly aligned and inserted into the annular fixing plate 2 3; the annular fixing plate A plurality of positioning blocks 31 are provided on the inner side of the second 3, and a plurality of positioning grooves 421 which are interference fit with the plurality of positioning blocks 31 are provided on the slot 42. Specifically, the width of the positioning block 31 is greater than the width of the positioning groove 421. When the positioning block 31 is inserted into the positioning groove 421, the positioning groove 421 provides a force to the positioning block 31 in the direction of the end cover 4, and the positioning block 31 provides an opposite force to the positioning groove 421, thereby forming a plurality of extrusion points to deform the bending portion 41, thereby ensuring the stability of the connection between the end cover 4 and the annular fixing plate second 3. During disassembly, since the bending portion 41 is deformed, it is necessary to use external tools to disassemble the end cover 4. In addition, PU glue can be applied to the outer side of the annular fixing plate second 3 to make the connection between the end cover 4 and the annular fixing plate second 3 more firmly.

[0027] In this embodiment, the end cover 4 is a concave structure when viewed from the side. Specifically, the end cover 4 includes a buckle position 43 that is recessed inwardly, and the buckle position 43 is buckled with the external assembly to fix it. For example, the clamping portion connecting the external assembly and the end cover 4 is set to be similar to a "convex" shape or an "L" shape. During installation, the connection between the end cover 4 and the external assembly can be completed by directly pressing down with force until the clamping portion and the buckle position 43 are engaged. The buckle position 43 is close to the end of the filter element 1. The cover ring 44 extends outward. During installation, the inner side of the cover ring 44 abuts against the side of the filter element 1, and the buckle position 43 is far from the end of the cover ring 44. The end of the mating surface 45 extends outward. The protrusion distance is 2mm, the snap-fit ​​part of the external assembly is adapted to the size of the buckle position, the snap-fit ​​part and the mating surface are interference fit, in addition, the upper end face and the side face of the mating surface 45 are chamfered at 45°, when installing, you only need to place the external assembly on the chamfer of the mating surface 45, and then press the external assembly hard, the snap-fit ​​part of the external assembly will fall down along the chamfer of the mating surface 45, and when the snap-fit ​​part falls down, it will squeeze the end cover 4 inward to cause the bending part 41 to deform again, and at the same time, the annular fixing plate 2 will also deform, thereby ensuring that the connection between the end cover 4 and the annular fixing plate 2 is more firmly secured, and then the snap-fit ​​part is snapped into the buckle position 43, so that the external assembly is snap-connected to the end cover 4.

[0028] In order to prevent the annular fixing plate 2 from being deformed due to excessive force in inserting the end cover 4, a cross-shaped reinforcing rib 21 is provided on the inner side of the annular fixing plate 2, and the lower end surface of the reinforcing rib 21 abuts against the filter element 1. The reinforcing rib 21 is used to increase the supporting strength of the annular fixing plate 2 to prevent it from being deformed during installation.

[0029] In this embodiment, a plurality of arc-shaped card slots 1 431 are symmetrically provided on both sides of the mating surface 45, and a plurality of arc-shaped card slots 2 451 corresponding to the plurality of arc-shaped card slots 1 431 are provided on both sides of the buckle position 43, and the arc-shaped card slots 2 451 are arranged below the arc-shaped card slots 1 431. There are eight arc-shaped card slots 1 431 and eight arc-shaped card slots 2 451 respectively, and four arc-shaped card slots 1 431 and arc-shaped card slots 2 451 are provided on each side. The arc-shaped card slots 1 431 and arc-shaped card slots 2 451 have the same size, with a width of 15 mm and a depth of 6.5 mm. The maximum distance between the two farthest arc-shaped card slots on each side is 114 mm. During installation, the external assembly abuts against the arc-shaped card slots 1 431 and arc-shaped card slots 2 451 to prevent shaking.

[0030] In this embodiment, the filter element 1 and the lower cover 5 are gap-fitted, and the filter element 1 can be bonded to the lower cover 5 by using PU glue. At the same time, a rubber pad can be installed in the gap between the filter element 1 and the lower cover 5 to improve the sealing effect of the filter element 1 and prevent the adhesion between the filter element 1 and the lower cover 5 from failing, which would cause the lower cover 5 to fall off directly.

[0031] In this embodiment, the side wall of the end cover 4 is injected with PU glue for bonding with the external assembly.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0033] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

1. A clipless air filter, comprising a filter element (1), wherein two ends of the filter element (1) are respectively bonded with a lower cover (5), and an annular fixing plate (2) adapted to the shape of the edge of the upper end surface of the filter element (1), wherein the annular fixing plate (2) is arranged obliquely, and an annular fixing plate (3) is arranged along the circumference direction of the annular fixing plate (2), characterized in that: A plurality of positioning blocks (31) are arranged on the inner side of the annular fixing plate (3), the annular fixing plate (3) is detachably connected to an end cover (4), a bending portion (41) is arranged on the inner side of the end cover (4), a slot (42) is arranged between the bending portion (41) and the end cover (4), the slot (42) is adapted to the shape of the annular fixing plate (3), and a plurality of positioning grooves (421) which are interference-fitted with the plurality of positioning blocks (31) are arranged on the slot (42), so that the bending portion (41) presses the plurality of positioning blocks (31) inwardly to form a plurality of pressing points for fixing.

2. The clipless air filter according to claim 1, characterized in that: The end cover (4) is a "concave"-shaped structure, and comprises an inwardly recessed buckle position (43), an end of the buckle position (43) close to the filter element (1) is provided with a cover ring (44) extending outward, and an end of the buckle position (43) away from the cover ring (44) is provided with a mating surface (45) extending outward.

3. The clipless air filter according to claim 1, characterized in that: A cross-shaped reinforcing rib (21) is provided on the inner side of the annular fixing plate 1 (2), and the lower end surface of the reinforcing rib (21) is in contact with the filter element (1).

4. The clipless air filter according to claim 2, characterized in that: A plurality of arc-shaped first slots (431) are symmetrically arranged on both sides of the matching surface (45), and a plurality of arc-shaped second slots (451) corresponding to the plurality of arc-shaped first slots (431) are arranged on both sides of the buckle position (43).

5. The clipless air filter according to claim 4, characterized in that: The arc-shaped slot one (431) and the arc-shaped slot two (451) are each provided with eight.

6. The clipless air filter according to claim 1, characterized in that: The filter element (1) and the lower cover (5) are clearance-fitted.

7. The clipless air filter according to claim 1, characterized in that: The side wall of the end cover (4) is injected with PU glue for bonding with the external assembly.

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