Engine noise reduction air filter

Abstract

The present invention relates to the technical field of noise reducers, and discloses an engine noise reduction air filter; comprising: a cylinder, the cylinder having an air inlet and an air outlet; a filter element, the filter element being installed at the air inlet; a plurality of silencer sheets, the plurality of silencer sheets being installed inside the cylinder, a slide groove being provided inside the cylinder for sliding connection with the silencer sheets, the end of the slide groove close to the air inlet being an abutting end, and the end close to the air outlet being an open end; a fastening member, the fastening member being installed at the air outlet, the fastening member being detachably connected to the cylinder, and the fastening member being used to cooperate with the abutting end to fix the position of the silencer sheets. In the present invention, the cylinder and the silencer sheets are arranged in a sliding manner, so as to facilitate the installation and removal of the silencer sheets, and a fastening member is provided to press the silencer sheets between the abutting end of the slide groove and the fastening member to fix the position of the silencer sheets, thereby preventing the silencer sheets from becoming unstable in position when impacted by a pulsed airflow, thereby affecting the silencer effect.

Description

Technical Field

[0001] The present invention relates to the technical field of noise reducers, and in particular to an engine noise reduction air filter. Background Art

[0002] The existing engine noise reduction air filter includes an outer cylinder with one or more air inlets and outlets, a filter element fixedly installed in each air inlet, and a silencer fixedly installed inside the outer cylinder. The filter element is fixed at the air inlet to perform preliminary filtering of the air, and the silencer silences the noise generated by the pulsed airflow during use.

[0003] The air filtering ability of the filter element gradually decreases with the passage of time, and the silencer is subjected to the impact of airflow for a long time. After long-term use, the silencer function gradually decreases. Therefore, the performance degradation of the filter element and silencer will lead to the overall performance degradation of the air filter. The entire unit needs to be replaced to improve the performance, and the cost of overall replacement is high. Summary of the Invention

[0004] The purpose of the present invention is to provide an engine noise reduction air filter to solve the above technical problems existing in the background technology.

[0005] The present invention is achieved through the following technical solutions:

[0006] An engine noise reduction air filter comprises: a cylinder having an air inlet and an air outlet; a filter element installed at the air inlet; a plurality of silencer plates installed inside the cylinder, a slide groove slidably connected to the silencer plates provided inside the cylinder, the end of the slide groove close to the air inlet being an abutting end, and the end close to the air outlet being an open end; a fastening piece installed at the air outlet, the fastening piece being detachably connected to the cylinder, and the fastening piece being used to cooperate with the abutting end to fix the position of the silencer plates.

[0007] In the above technical solution, the cylinder and the silencer are slidably arranged to facilitate the installation and disassembly of the silencer, and a tightening member is provided to tighten the silencer between the abutting end of the slide groove and the tightening member to fix the position of the silencer, thereby preventing the silencer from becoming unstable when impacted by the pulse airflow, thereby affecting the silencer effect.

[0008] Furthermore, the clamping member includes a first structural member and a second structural member. The first structural member includes a first ring and a plurality of clamping plates. The plurality of clamping plates are arranged along the circumference of the first ring. One end of the clamping plate is located in the annular cavity of the first ring and is fixed to the inner wall of the first ring. The other end extends along the axial direction of the first ring so that the end of the clamping plate protrudes from the first ring. The second structural member is a sleeve. The inner wall of the sleeve is provided with a thread. One end of the sleeve extends radially toward the inside of the sleeve to form a limiting portion. The limiting portion is used to abut against the first ring.

[0009] Furthermore, an elastic layer is provided on the surface of the first annular ring located on one side of the extending direction of the abutting piece.

[0010] Furthermore, a clamping member is provided at the abutting end of the slide groove, and the clamping member is a corner structure. The corner of the corner structure is rotatably connected to the cylinder. One end of the corner structure extends along the length direction of the slide groove and has a tendency to move away from the slide groove, and the other end of the corner structure extends along the width direction of the slide groove and has a tendency to rotate toward the inside of the slide groove; a buffer layer is provided on the surface of the clamping member close to the slide groove.

[0011] Furthermore, the interior of the cylinder is a truncated cone structured inner cavity, and a plurality of sound-absorbing sheets are evenly distributed along the circumference of the cylinder. The distribution of the plurality of sound-absorbing sheets is the same as the distribution of the plurality of abutting sheets.

[0012] Furthermore, the silencer has a sliding portion, which is slidably connected to the slide groove. On the cross section of the silencer, the edge of the sliding portion is concave; along the direction from the air inlet to the air outlet, the cross-sectional area of the silencer gradually increases, making it easier for the silencer to be inserted into the slide groove from the open end of the slide groove at the air outlet.

[0013] Furthermore, the filter element is detachably connected to the air inlet of the cylinder through the filter element mounting assembly; the filter element mounting assembly includes a support base, a mounting seat, a rotating member and a fastening member; the support base is fixed at the air inlet, and the support base has a matching groove; the mounting seat is provided with a mounting groove for mounting the filter element, one end of the rotating member is rotatably connected to the support base, and the other end is rotatably connected to the mounting seat, and the mounting seat can be rotated into or out of the matching groove; the fastening member is rotatably connected to the support base, and when the mounting seat is rotated into the matching groove, the fastening member is used to fasten and fix the rotating member.

[0014] Furthermore, the rotating part is simultaneously fitted with the end surface of the mounting seat and the end surface of the supporting base. A limiting groove is provided on the end surface of the supporting base, and the rotating part rotates in the limiting groove; one end of the fastening part is a connecting end, and the other end is a pressing end. The connecting end is rotatably connected to the end of the supporting base, and the pressing end is bent toward the connecting end. The pressing end is located in the limiting groove and has a tendency to press toward the supporting base; when the mounting seat is located outside the matching groove, the bent portion of the fastening part is pressed tightly against the surface of the rotating part; when the mounting seat rotates toward the matching groove, the rotating part moves toward the pressing end of the fastening part to make the bent portion slide off the surface of the rotating part.

[0015] Furthermore, the thickness of the rotating member gradually decreases along the direction from the pressing end to the connecting end.

[0016] Furthermore, the inner wall of the mating groove is a smooth curved structure; the mounting base is a cylindrical structural member; when the mounting base is located in the mating groove, the edge of the mounting groove contacts and fits with the edge of the mating groove; the width of the mounting groove gradually increases from the groove opening to the bottom of the groove.

[0017] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0018] 1. In the present invention, by arranging a sliding connection between the muffler sheet and the cylinder, the muffler sheet is easily installed and removed, and can be maintained and replaced according to the use status of a single muffler sheet, which is beneficial to improving the overall service life of the engine noise reduction air filter. In addition, the abutting end of the chute cooperates with the abutting member to improve the installation stability of the muffler sheet and the cylinder. When the muffler sheet is impacted by airflow, the muffler sheet can maintain stability when connected to the cylinder, thereby maintaining stable muffler performance.

[0019] 2. In the present invention, by setting a rotational fit between the mounting seat and the support base, when the filter element needs to be replaced, the mounting seat is rotated to a position outside the matching groove for easy replacement of the filter element, thereby improving the convenience of replacing the filter element. After the replacement is completed, the mounting seat is rotated back into the matching groove again, and the position of the rotating member is fixed by the fastening member, thereby fixing the relative position of the mounting groove and the support base, so that the filter element can be used normally; the bending portion of the fastening member is also used to fasten the rotating member. When the mounting seat is rotated into the matching groove, the mounting seat can be directly pushed to fix the rotating member. The connection method is simple to operate and the fixing stability is relatively strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be considered as limiting the scope. A person of ordinary skill in the art can also derive other relevant drawings based on these drawings without inventive effort.

[0021] Figure 1 A schematic diagram of the overall structure of the noise reduction air filter provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the coordination between the noise reduction air filter and the protective cover provided in an embodiment of the present invention;

[0023] Figure 3 A schematic diagram of the arrangement of the sound-absorbing sheets provided in an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the installation of a sound-absorbing sheet according to an embodiment of the present invention;

[0025] Figure 5 An overall cross-sectional view of a muffler provided in an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of the coordination between the muffler plate and the slide groove provided in an embodiment of the present invention;

[0027] Figure 7 A schematic structural diagram of a clamping member provided in an embodiment of the present invention;

[0028] Figure 8 A schematic diagram of a first structural member provided in an embodiment of the present invention;

[0029] Figure 9 A schematic diagram of a second structural member provided in an embodiment of the present invention;

[0030] Figure 10 A schematic diagram of the structure of a filter element installation assembly provided in an embodiment of the present invention;

[0031] Figure 11 A detailed diagram of point A provided in an embodiment of the present invention;

[0032] Figure 12 A schematic diagram of the filter element structure provided by an embodiment of the present invention;

[0033] Figure 13 A diagram illustrating the rotation process of the mounting base provided in an embodiment of the present invention;

[0034] Figure 14 A diagram illustrating the rotation process of a rotating member according to an embodiment of the present invention.

[0035] Markings and corresponding parts names in the accompanying drawings:

[0036] 100-cylinder, 110-air inlet, 120-air outlet, 130-slide groove, 131-opening end, 132-butting end, 140-protective cover, 200-silencer, 210-sliding part, 300-tightening part, 310-first structural part, 311-first ring, 312-tightening piece, 313-elastic layer, 320-second structural part, 321-limiting part, 400-clamping part, 500-support base, 510-matching groove, 520-limiting groove, 600-mounting seat, 610-mounting groove, 700-rotating part, 800-fastening part, 810-connecting end, 820-pressing end, 821-bending part, 900-filter element. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0038] In the following description, numerous specific details are set forth to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that these specific details are not necessarily required to practice the present invention. In other instances, well-known structures, circuits, materials, or methods are not described in detail to avoid obscuring the present invention.

[0039] Throughout this specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment of the present invention. Therefore, appearances of the phrases "one embodiment," "an embodiment," "an example," or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combinations and / or subcombinations. Furthermore, it will be understood by those of ordinary skill in the art that the figures provided herein are for illustrative purposes only and are not necessarily drawn to scale. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0040] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0041] Example

[0042] This embodiment provides an engine noise reduction air filter, combined with Figures 1 to 14As shown, it includes: a cylinder 100, the cylinder 100 has an air inlet 110 and an air outlet 120; the cylinder 100 is the main structure when the silencer plate 200 is installed. In the engine noise reduction air filter, the cylinder 100 is the main equipment of the noise reduction air filter, and the filter element 900 is installed at the air inlet 110 to filter the gas entering the cylinder 100. When the cylinder 100 and the silencer plate 200 are installed, a plurality of slide grooves 130 are provided on the inner wall of the cylinder 100. The slide groove 130 can be opened by a block structure fixed on the inner wall of the cylinder 100, or it can be directly opened on the inner wall of the cylinder 100. One end of the slide groove 130 is an open end 131, and the other end is an abutment end 132. In order to match the direction of air intake, the air inlet 110 of the cylinder 100 is close to the abutment end 132, and the air outlet 120 is close to the abutment end 132. 0 is close to the open end 131. Because a filter element 900 is installed at the air inlet 110 of the cylinder 100, it is inconvenient to install the silencer 200 from the air inlet 110. Therefore, the opening of the slide groove 130 is generally set close to the air outlet 120 of the cylinder 100, which is convenient for installing the silencer 200 into the cylinder 100 or taking it out from the cylinder 100; there are multiple silencer sheets 200 inside the cylinder 100, each of which has a corresponding slide groove 130, and the silencer 200 is slidably connected to the slide groove 130 for easy disassembly and installation; at the same time, a fastening member 300 is also provided, which is detachably connected to the cylinder 100, and the fastening member 300 is used to cooperate with the abutting end 132 to fix the position of the silencer sheet 200 to avoid position displacement of the silencer sheet 200 when it is impacted by airflow.

[0043] In some embodiments, in order to match the installation structure of the silencer plate 200 and the cylinder 100, the cavity inside the cylinder 100 for air flow to pass through is generally a conical structure cavity. The areas of the air inlet 110 and the air outlet 120 of the cylinder 100 are adjusted according to actual needs, and the multiple silencer plates 200 arranged inside the cylinder 100 are evenly distributed along the circumference of the cylinder 100.

[0044] In the prior art, although the muffler sheet 200 and the cylinder 100 are fixedly arranged and are not convenient for replacement and maintenance, the fixed connection structure is stable, and the connection between the muffler sheet 200 and the cylinder 100 is very stable, and the muffler sheet 200 is not easy to shake. Therefore, in order to make up for the deficiency of the sliding connection between the muffler sheet 200 and the cylinder 100 in this application, a fastening member 300 is further provided. The structural combination of the fastening member 300 Figure 8 and Figure 9As shown, the clamping member 300 includes a first structural member 310 and a second structural member 320. The first structural member 310 is mainly used to clamp against the silencer plate 200, and the second structural member 320 is mainly used to fix the relative position of the first structural member 310 and the cylinder 100; the first structural member 310 includes a first ring 311 and a plurality of clamping plates 312. The annular cavity of the first ring 311 is the same size as the air outlet 120 of the cylinder 100, and the air outlet is not affected as much as possible. The plurality of clamping plates 312 are arranged along the circumference of the first ring 311. One end of the clamping plate 312 is located in the annular cavity of the first ring 311 and is fixed to the inner wall of the first ring 311. The other end extends along the axial direction of the first ring 311 and is protruded from the first ring 311. When the first structural member 310 is in use, the first ring 311 and the end of the air outlet 120 are When the cam 330 is in the unlock state, the locking cam 330 is in the unlock state, and the locking cam 330 is locked, so that the cam 330 can be unlocked and locked.

[0045] The distribution of the clamping piece 312 in the first ring 311 is the same as the distribution of the silencer piece 200 in the cylinder 100, so that each clamping piece 312 can clamp the corresponding silencer piece 200. In addition, in order to further improve the connection stability between the silencer piece 200 at the abutting end 132 and the clamping piece 312, an elastic layer 313 is provided on the surface of the first ring 311 on the side of the extension direction of the clamping piece 312. The elastic layer 313 is generally a compressible structure such as a rubber layer or a silicone layer. During the process of tightening the sleeve and the cylinder 100, the elastic layer 313 is gradually compressed, so that the clamping piece 312 and the silencer piece 200 are further tightened.

[0046] During specific use, the protruding end of the clamping piece 312 of the first structural member 310 is inserted into the interior of the cylinder 100. At the same time, it should be noted that the clamping piece 312 and the silencer piece 200 are arranged in a one-to-one correspondence, and the first ring 311 is in surface-to-surface contact with the end face of the cylinder 100 where the air outlet 120 is located. In order to ensure accurate positioning of the clamping piece 312 and the silencer piece 200, a protrusion and a groove can be provided between the cylinder 100 and the first ring 311 to play a positioning role. After the first ring 311 is installed, the sleeve is threadedly connected to the cylinder 100 to fix the position of the first ring 311; in other embodiments, the clamping piece 312 can be directly a block structure to enhance structural strength.

[0047] Since the silencer 200 is slidably connected to the slide groove 130, and the silencer 200 is distributed along the circumference of the cylinder 100, in order to prevent the silencer 200 from falling off the slide groove 130 along the radial direction of the cylinder 100, a limiting structure of the slide groove 130 and the silencer 200 can be set. The part where the silencer 200 is slidably connected to the slide groove 130 is the sliding part 210. On the cross section of the silencer 200, the cross section of the silencer 200 refers to the cross section in the radial direction of the cylinder 100. The edge of the sliding part 210 is concave, so that the sliding part 210 has a structure that is thin in the middle and thick at both ends, so that the silencer 200 can only move along the extension direction of the slide groove 130 and cannot move in other directions.

[0048] Along the direction from the air inlet 110 to the air outlet 120, the cross-sectional area of the silencer 200 gradually increases. When the silencer 200 is installed in the slide groove 130, it is first inserted from the open end 131 of the slide groove 130. Therefore, the cross-sectional area of the silencer 200 is set to change gradually, so that the silencer 200 can be inserted into the slide groove 130 from the open end 131 of the slide groove 130 at the air outlet 120. As the silencer 200 gets closer to the abutment end 132 of the slide groove 130, the connection between the silencer 200 and the slide groove 130 becomes more stable.

[0049] In this embodiment, in order to further improve the stability of the connection between the slide 130 and the silencer 200, a clamping member 400 is provided at the abutting end 132 of the slide 130, and the clamping member 400 cooperates with the tightening member 300 connected to the cylinder 100. The stronger the tightening effect of the tightening member 300 on the silencer 200, the stronger the clamping effect of the clamping member 400 on the silencer 200, so that the connection between the silencer 200 and the slide 130 is tighter.

[0050] The structure of the clamping member 400 is combined Figure 7As shown, the clamping member 400 is a corner structure, the corner is used to accommodate an edge of the end of the muffler 200, the corner of the corner structure is rotatably connected to the cylinder 100, and one end of the corner structure extends along the length direction of the chute 130 and has a tendency to rotate away from the chute 130, and the other end extends along the width direction of the chute 130 and has a tendency to rotate toward the inside of the chute 130, as shown. Figure 7 As shown on the left side, when the end of the silencer 200 moves to the abutment end 132, the silencer 200 abuts against one end of the corner structure extending along the width direction of the slide groove 130, moving this part of the corner structure in the direction away from the slide groove 130. Due to the characteristics of the corner structure, the other end of the corner structure will move in the direction close to the slide groove 130 and hold the silencer 200 tightly. There are generally two clamping parts 400, and the two clamping parts 400 are arranged along the width direction of the slide groove 130. The two clamping parts 400 hold the two sides of the silencer 200 tightly, and a buffer layer is provided on the surface of the clamping part 400 close to the slide groove 130. The buffer layer is a rubber layer or a silicone layer, which increases friction, increases the clamping force, and improves the installation stability of the silencer 200.

[0051] In order to improve the clamping effect of the clamping member 400, when the corner is in a natural state, the end of the corner structure extending along the length direction of the slide groove 130 is recessed inside the slide groove 130, and the end of the corner structure extending along the width direction of the slide groove 130 is protruding, which does not affect the normal movement of the silencer 200 in the slide groove 130.

[0052] When the filter element 900 is installed, the filter element 900 is detachably connected to the air inlet 110 of the cylinder 100 through the filter element 900 installation assembly. The filter element 900 installation assembly includes a support base 500, a mounting base 600, a rotating member 700 and a fastening member 800; the support base 500 is fixed at the air inlet 110, and the support base 500 is used to support the position of the installed filter element 900. In the engine noise reduction air filter, the support base 500 is generally fixedly connected to the cylinder 100. However, due to the structure and position restrictions of the air inlet 110 of the cylinder 100, the filter element 900 arranged at the air inlet 110 is not convenient for direct plug-in installation. Therefore, in this embodiment, the mounting base 600 and the support base 500 are set to be rotatably connected. By changing the position of the mounting base 600 and the support base 500, the mounting base 600 can be rotated to a position convenient for installing the filter element 900.

[0053] The support base 500 has a mating groove 510; the mounting base 600 is provided with a mounting groove 610 for mounting the filter element 900, one end of the rotating member 700 is rotatably connected to the support base 500, and the other end is rotatably connected to the mounting base 600, and the mounting base 600 can be rotated into the mating groove 510 or out of the mating groove 510; the fastening member 800 is rotatably connected to the support base 500, and when the mounting base 600 rotates into the mating groove 510, the fastening member 800 is used to fasten and fix the rotating member 700; one end of the filter element 900 is installed in the mounting groove 610.

[0054] When the mounting seat 600 is located in the matching groove 510, the filter element 900 is at the position of the air inlet 110, filtering the gas entering the cylinder 100. When the mounting seat 600 is rotated out of the matching groove 510, the mounting seat 600 is not restricted by the air inlet 110 and the structure of the cylinder 100. At this time, the connection between the mounting seat 600 and the filter element 900 is convenient for replacement and disassembly.

[0055] In this embodiment, the rotating member 700 is simultaneously in contact with the end surface of the mounting seat 600 and the end surface of the support base 500. A limiting groove 520 is provided on the end surface of the support base 500. The rotating member 700 rotates in the limiting groove 520. The limiting groove 520 limits the rotation angle of the rotating member 700 so that the mounting seat 600 rotates within a specified range. The limiting groove 520 has two limiting edges. When the rotating member 700 abuts against one of the limiting edges, the mounting seat 600 is farthest from the matching groove 510. When the rotating member 700 abuts against the other limiting edge, the mounting groove 610 is installed in the matching groove 510, and the filter element 900 is located in the specified installation position.

[0056] The inner wall of the mating groove 510 on the support base 500 is a smooth curved structure, and the mounting seat 600 is a cylindrical structural part. When the mounting seat 600 is located in the mating groove 510, the side wall of the mounting seat 600 is surface-fitted with the inner wall surface of the mating groove 510, and a part of the opening of the mating groove 510 is located on the side wall of the support base 500, so that the mounting seat 600 can be rotated out of the mating groove 510, and the other part is located at the top of the support base 500, so that the filter element 900 can be installed at the air inlet 110 through the opening.

[0057] One end of the fastening member 800 provided in this embodiment is a connecting end 810, and the other end is a pressing end 820. The arrangement direction from the connecting end 810 to the pressing end 820 of the fastening member 800 has an angle with the arrangement direction between the two ends of the rotating member 700. The connecting end 810 is rotatably connected to the support base 500, and a torsion spring is provided at the connection position, so that the pressing end 820 of the fastening member 800 has a tendency to be pressed toward the support base 500, and the pressing end 820 is located in the limiting groove 520. The pressing end 820 also has a bending portion 821 bent toward the connecting end 810, and the bending portion 821 faces the support base 500.

[0058] Combine Figure 14 As shown, when the mounting groove 610 is located outside the matching groove 510, the pressing end 820 is in contact with the surface of the rotating member 700, and the bent portion 821 is also pressed against the surface of the rotating member 700. At this time, the fastening member 800 cannot form a fastening effect. When an external force drives the rotating member 700 to rotate, causing the mounting groove 610 to rotate toward the matching groove 510, as the rotating member 700 rotates, the bent portion 821 moves on the surface of the rotating member 700 until the bent portion 821 slides down from the surface of the rotating member 700, and the rotating member 700 is completely located in the fastening range of the fastening member 800. 21 hooks one side of the rotating member 700. In the absence of external force to lift the fastening member 800 from the surface of the support base 500, the rotating member 700 will not be able to detach from the bottom of the fastening member 800, thereby realizing the function of the fastening member 800 to fix the relative position of the rotating member 700. At this time, the rotating member 700 is in contact with one of the limiting edges of the limiting groove 520, completely fixing the position of the rotating member 700; in order to make the bending portion 821 and the rotating member 700 better fit together, the thickness of the rotating member 700 is set to gradually decrease along the direction from the tightening end 820 to the connecting end 810.

[0059] When rotating the mounting seat 600 out of the mating groove 510, it is necessary to lift the bent portion 821 of the fastening member 800 first to facilitate the operation of the rotating member 700. A plurality of protrusions are provided on the surface of the bent portion 821 away from the support base 500 to increase the friction force and facilitate lifting the bent portion 821 from the surface of the support base 500.

[0060] The mounting groove 610 is provided on the mounting seat 600, and the width of the mounting groove 610 gradually increases in the direction from the groove opening to the groove bottom of the mounting groove 610, thereby improving the stability of the filter element 900 when being installed with the mounting seat 600. Moreover, when the mounting seat 600 is located in the mating groove 510, the edge of the mounting groove 610 contacts and fits with the edge of the mating groove 510, and the edge of the mating groove 510 can provide certain support for the filter element 900 installed on the mounting groove 610.

[0061] In this embodiment, a protective cover 140 is also provided at the air inlet position of the cylinder 100 to improve the air intake efficiency of the air inlet 110. It should be noted that the protective cover 140 cannot affect the rotation of the mounting seat 600 and cannot affect the replacement of the filter element 900.

[0062] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific implementation methods of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An engine noise reduction air filter, characterized in that: include: A cylinder (100), the cylinder (100) having an air inlet (110) and an air outlet (120); a filter element (900), the filter element (900) being installed at the air inlet (110); A plurality of muffler sheets (200), wherein the plurality of muffler sheets (200) are installed inside the cylinder (100), a slide groove (130) is provided inside the cylinder (100) and is slidably connected to the muffler sheets (200), an end of the slide groove (130) close to the air inlet (110) is an abutting end (132), and an end close to the air outlet (120) is an open end (131); a fastening member (300), the fastening member (300) being installed at the air outlet (120), the fastening member (300) being detachably connected to the cylinder (100), and the fastening member (300) being used to cooperate with the abutting end (132) to fix the position of the muffler plate (200); The retaining member (300) includes a first structural member (310) and a second structural member (320), the first structural member (310) includes a first circular ring (311) and a plurality of retaining plates (312), the plurality of retaining plates (312) are arranged along the circumference of the first circular ring (311), one end of the retaining plate (312) is located in the annular cavity of the first circular ring (311) and is fixed to the inner wall of the first circular ring (311), and the other end extends along the axial direction of the first circular ring (311), so that the end of the retaining plate (312) is protruding from the first circular ring (311); The second structural member (320) is a sleeve, the inner side wall of the sleeve is provided with a thread, one end of the sleeve extends radially toward the inside of the sleeve to form a limiting portion (321), and the limiting portion (321) is used to abut against the first circular ring (311); An elastic layer (313) is provided on the surface of the first circular ring (311) located on one side of the extension direction of the abutting piece (312); The abutting end (132) of the chute (130) is provided with a clamping member (400), and the clamping member (400) is a corner structure. The corner of the corner structure is rotatably connected to the cylinder (100), and one end of the corner structure extends along the length direction of the chute (130) and has a tendency to move away from the chute (130), and the other end of the corner structure extends along the width direction of the chute (130) and has a tendency to rotate toward the inside of the chute (130); a buffer layer is provided on the surface of the clamping member (400) close to the chute (130).

2. The engine noise reduction air filter according to claim 1, characterized in that: The interior of the cylinder (100) is a truncated cone structure inner cavity, and the plurality of muffler sheets (200) are evenly distributed along the circumference of the cylinder (100). The distribution mode of the plurality of muffler sheets (200) is the same as the distribution mode of the plurality of abutting sheets (312).

3. The engine noise reduction air filter according to claim 1, characterized in that: The muffler plate (200) has a sliding portion (210), the sliding portion (210) is slidably connected to the slide groove (130), and an edge of the sliding portion (210) is recessed on a cross section of the muffler plate (200); Along the direction from the air inlet (110) to the air outlet (120), the cross-sectional area of the sound-absorbing sheet (200) gradually increases.

4. The engine noise reduction air filter according to claim 1, characterized in that: The filter element (900) is detachably connected to the air inlet (110) of the barrel (100) via a filter element mounting assembly; The filter element (900) installation assembly comprises a support base (500), a mounting seat (600), a rotating member (700), and a fastening member (800); The support base (500) is fixed at the air inlet (110), and the support base (500) has a matching groove (510); the mounting seat (600) is provided with a mounting groove (610) for mounting the filter element (900); one end of the rotating member (700) is rotatably connected to the support base (500), and the other end is rotatably connected to the mounting seat (600), and the mounting seat (600) can be rotated into the matching groove (510) or out of the matching groove (510); the fastening member (800) is rotatably connected to the support base (500), and when the mounting seat (600) is rotated into the matching groove (510), the fastening member (800) is used to fasten and fix the rotating member (700).

5. The engine noise reduction air filter according to claim 4, characterized in that: The rotating member (700) is simultaneously fitted with the end surface of the mounting seat (600) and the end surface of the support base (500); a limiting groove (520) is provided on the end surface of the support base (500), and the rotating member (700) rotates in the limiting groove (520); One end of the fastening member (800) is a connecting end (810), and the other end is a pressing end (820), the connecting end (810) is rotatably connected to the end of the support base (500), the pressing end (820) has a bent portion (821) bent toward the connecting end (810), and the pressing end (820) is located in the limiting groove (520) and has a tendency to press toward the support base (500); When the mounting seat (600) is located outside the matching groove (510), the bent portion (821) of the fastening member (800) is pressed tightly against the surface of the rotating member (700); When the mounting seat (600) rotates toward the matching groove (510), the rotating member (700) moves toward the pressing end (820) of the fastening member (800), so that the bent portion (821) slides off the surface of the rotating member (700).

6. The engine noise reduction air filter according to claim 5, characterized in that: The thickness of the rotating member (700) gradually decreases along the direction from the pressing end (820) to the connecting end (810).

7. The engine noise reduction air filter according to claim 4, characterized in that: The inner wall of the matching groove (510) is a smooth curved surface structure; the mounting seat (600) is a cylindrical structural member; when the mounting seat (600) is located in the matching groove (510), the edge of the mounting groove (610) contacts and mates with the edge of the matching groove (510); the width of the mounting groove (610) gradually increases in a direction from the groove opening of the mounting groove (610) to the groove bottom.

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