CN215949774U

CN215949774U - Spraying plastics of air compressor machine is discharged and is fallen structure of making an uproar

Info

Publication number: CN215949774U
Application number: CN202122385257.1U
Authority: CN
Inventors: 高雯; 覃星念; 沈琼
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-04
Anticipated expiration: 2031-09-29

Abstract

The application provides a spraying plastics of air compressor machine is discharged and is fallen structure of making an uproar belongs to the air compressor machine and falls the technical field of making an uproar. The plastic spraying exhaust noise reduction structure of the air compressor comprises an elastic mechanism and an adjusting mechanism. The elastic mechanism comprises a valve plate body, a plastic spraying layer, a cylinder and a buffer assembly, wherein the plastic spraying layer is arranged on one side of the valve plate body, the cylinder is symmetrically distributed, and the cylinder is connected to one side of the plastic spraying layer. This application is through first spring, the second spring, the extension board, the exhaust hole, sealed piece, the exhaust valve block body, the spraying plastics layer, the threaded rod, the effect of I piece and support, thereby reached and reduced the exhaust valve block and pat the purpose that the valve plate produced the noise, through pat the valve plate region at the exhaust valve block and near carry out the spraying plastics processing, the noise that produces when reducing to pat and absorb partly noise, through setting up buffer structure, the dynamics of slowing down the exhaust valve block whereabouts, reduce the decibel of noise, reduce air compressor and produce the injury of noise to people.

Description

Spraying plastics of air compressor machine is discharged and is fallen structure of making an uproar

Technical Field

The application relates to the field of making an uproar falls in the air compressor machine, particularly, relates to a structure of making an uproar falls in spraying plastics exhaust of air compressor machine.

Background

The air compressor is a device for compressing gas, most of the air compressors are of a reciprocating piston type, rotating blades or rotating screws, the air compressor on the market has large noise, and the noise reduction method of the air compressor is known to be as follows by referring to the related technology: 1. the air inlet and outlet of the air compressor can be provided with corresponding silencers to properly reduce noise; 2. the machine body and the shell can increase the sound-proof housing and reduce the mechanical noise of the air compressor; 3. the soft and thick vibration reduction base of the base cushion layer of the air compressor can slow down vibration and reduce noise to a certain extent, but the methods can not reduce the noise generated when the exhaust valve plate beats the valve plate, when the air compressor works, the exhaust valve plate beats the valve plate to generate noise, if people are exposed under the noise for a long time, permanent deafness can be caused, dyspepsia, poor spirit, nausea and vomiting can be caused well, and even casualty accidents can be caused.

How to invent a spraying plastics of air compressor machine is discharged air and is fallen the noise reduction structure and improved these problems, become the problem that the skilled person in the art needs to solve urgently.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the application provides a structure of making an uproar falls in spraying plastics of air compressor machine, aims at improving the problem that the discharge valve piece patted the valve plate and can produce great noise.

The embodiment of the application provides a spraying plastics of air compressor machine structure of making an uproar falls, including elastic mechanism and adjustment mechanism.

Elastic mechanism includes valve plate body, spraying plastics layer, drum and buffer assembly, the spraying plastics layer set up in valve plate body one side, the drum sets up to two symmetric distributions, the drum connect in spraying plastics layer one side, buffer assembly sliding connection in inside the drum, the valve plate body with the hole of exhausting has been seted up to the spraying plastics internal surface, the hole of exhausting is located drum week side, adjustment mechanism includes supporting component, threaded rod, I piece and seal assembly, buffer assembly slide run through in supporting component, the threaded rod screw thread run through in the supporting component middle part, the I piece connect in threaded rod one end, seal assembly rotate connect in the I piece is outside, seal assembly with the spraying plastics layer is laminated mutually, seal assembly can plug up the hole of exhausting.

In the implementation process, exhaust hole on valve plate body and the spraying plastics layer is used for the exhaust, the drum is used for making buffering subassembly can reciprocate, buffering subassembly cushions sealing assembly through supporting component, make the last air discharge valve block of sealing assembly move down when patting the valve plate body, the spraying plastics layer can cushion the air discharge valve block, reduce the noise that the patting produced and absorb partly noise, threaded rod and I-shaped piece are used for adjusting the distance between sealing assembly and the spraying plastics layer, air compressor's exhaust pressure is adjusted to the accessible demand.

In a specific implementation scheme, the buffering assembly comprises a guide rail, a first spring, a second spring, a supporting plate and a sliding rail, the guide rail is connected inside the cylinder in a sliding mode, the inner side of the cylinder is in clearance fit with the outer surface of the guide rail, the first spring and the second spring are sleeved on the outer surface of the guide rail, the supporting plate is installed at one end of the guide rail, and the sliding rail is connected to two sides of the guide rail.

In the implementation process, the guide rail is used for moving in the cylinder, the first spring and the second spring are limited, the first spring and the second spring are not prone to deviation, and the first spring, the second spring and the supporting plate are used for buffering the exhaust valve plate through the supporting assembly.

In a specific embodiment, the slide rail is an arc-shaped structure, sliding grooves are formed in two sides of the inner wall of the cylinder, and the slide rail is slidably connected to the sliding grooves.

In the implementation process, the sliding rail and the sliding groove are used for improving the attaching degree of the guide rail and the inner wall of the cylinder, so that the guide rail is not easy to deviate when moving in the cylinder.

In a specific embodiment, the support assembly comprises a support plate, wherein a guide hole is formed in the inner surface of the support plate, and the guide rail slidably penetrates through the guide hole.

In the implementation process, the guide hole is used for enabling the guide rail to penetrate through the support plate, and the support plate can move on the guide rail.

In a specific embodiment, the first spring is located between the fulcrum and the cylinder and the second spring is located between the fulcrum and the fulcrum.

In the implementation process, the elastic force of the first spring and the elastic force of the second spring are used for buffering the support plate, and the tendency that the support plate falls back downwards is relieved.

In a specific embodiment, the inner surface of the support plate is provided with a threaded hole, and the threaded hole is in threaded connection with the threaded rod.

In the above implementation, the threaded hole is used to threadedly connect the threaded rod with the support plate.

In a specific embodiment, the sealing assembly comprises a support, an exhaust valve plate body and a sealing block, the support is of a U-shaped structure, a clamping hole is formed in the inner surface of the support, the I-shaped block is rotatably connected in the clamping hole, the exhaust valve plate body is installed at two ends of the support, and the sealing block is connected to one side of the exhaust valve plate body.

In the implementation process, the clamping hole is used for enabling the I-shaped block to be rotatably connected with the support, the I-shaped block can only drive the exhaust valve block body to move up and down through the support when rotating and moving up and down, the exhaust valve block body cannot rotate, the exhaust valve block body is used for plugging the exhaust hole, and the sealing block is used for improving the sealing performance between the exhaust valve block body and the exhaust hole and enabling the exhaust hole not to be prone to leakage.

In a specific embodiment, the sealing block is a conical elastic structure, the sealing block is in interference fit with the exhaust holes, and the exhaust holes correspond to the sealing block one to one.

In a specific embodiment, the inner surface of the exhaust valve plate body is provided with a through hole, and the cylinder penetrates through the through hole in a sliding manner.

In the above implementation process, the through hole is used for enabling the exhaust valve plate body to move on the cylinder.

In a particular embodiment, the adjustment mechanism further comprises a handle connected to the other end of the threaded rod.

In the implementation process, the handle is used for facilitating people to rotate the threaded rod.

Drawings

In order to more clearly explain the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a plastic-spraying exhaust noise reduction structure of an air compressor provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a spring mechanism according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a cushion assembly according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of an adjustment mechanism provided in an embodiment of the present application;

FIG. 5 is a schematic structural view of a support assembly provided in accordance with an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a seal assembly according to an embodiment of the present disclosure.

In the figure: 10-a resilient mechanism; 110-a valve plate body; 120-spraying a plastic layer; 130-a cylinder; 140-a buffer assembly; 141-a guide rail; 142-a first spring; 143-a second spring; 144-a pallet; 145-a slide rail; 150-a chute; 160-vent hole; 20-an adjustment mechanism; 210-a support assembly; 211-plate; 212-a threaded hole; 213-a guide hole; 220-a threaded rod; 230-an I-shaped block; 240-a seal assembly; 241-a bracket; 242-exhaust valve plate body; 243-sealing block; 244-card holes; 245-a through-hole; 250-a handle.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, the present application provides a plastic spraying, exhausting and noise reducing structure of an air compressor, which includes an elastic mechanism 10 and an adjusting mechanism 20.

The adjusting mechanism 20 is connected to the elastic mechanism 10 in a sliding mode, the elastic mechanism 10 is used for buffering the adjusting mechanism 20, the force of the exhaust valve plate on the adjusting mechanism 20 when the exhaust valve plate beats the valve plate is relieved, noise generated by beating is reduced, a part of noise is absorbed, and the purpose of noise reduction is achieved.

Referring to fig. 1 and 2, the elastic mechanism 10 includes a valve plate body 110, a plastic injection layer 120, a cylinder 130 and a buffer assembly 140, the plastic injection layer 120 is disposed on one side of the valve plate body 110, specifically, the plastic injection layer 120 is fixedly connected to the valve plate body 110 by plastic injection, the cylinder 130 is disposed in two symmetrical distributions, the cylinder 130 is connected to one side of the plastic injection layer 120, specifically, the cylinder 130 is fixedly connected to one side of the plastic injection layer 120 by welding, the buffer assembly 140 is slidably connected to the inside of the cylinder 130, the inner surfaces of the valve plate body 110 and the plastic injection layer 120 are provided with exhaust holes 160, the exhaust holes 160 are located on the periphery of the cylinder 130, the exhaust holes 160 are provided for exhausting air in the air compressor, the plastic injection layer 120 is provided to reduce noise generated by slapping and absorb a part of the noise, the plastic injection exhaust and noise reduction are performed, the cylinder 130 is provided to enable the buffer assembly 140 to move up and down, the buffer assembly 140 is provided, the exhaust valve plate can be buffered, the force of the exhaust valve plate beating the valve plate body 110 is reduced, and the noise decibel is reduced.

Referring to fig. 2 and 3, the buffer assembly 140 includes a guide rail 141, a first spring 142, a second spring 143, a support plate 144 and a slide rail 145, the guide rail 141 is slidably connected inside the cylinder 130, an inner side of the cylinder 130 is in clearance fit with an outer surface of the guide rail 141, the first spring 142 and the second spring 143 are sleeved on the outer surface of the guide rail 141, the support plate 144 is installed at one end of the guide rail 141, specifically, the support plate 144 is fixedly installed at one end of the guide rail 141 by welding, the slide rail 145 is connected to two sides of the guide rail 141, specifically, the slide rail 145 is fixedly connected to two sides of the guide rail 141 by welding, the guide rail 141 is provided, the guide rail 141 can move inside the cylinder 130, and the first spring 142 and the second spring 143 are limited, so that the first spring 142 and the second spring 143 are not easily deviated, and the first spring 142, the second spring 143 and the support assembly 210 is provided to buffer the exhaust valve plate.

In some specific embodiments, the sliding rail 145 has an arc-shaped structure, the sliding grooves 150 are formed on two sides of the inner wall of the cylinder 130, the sliding rail 145 is slidably connected to the sliding grooves 150, and the sliding rail 145 and the sliding grooves 150 are provided to improve the fit between the guide rail 141 and the inner wall of the cylinder 130, so that the guide rail 141 is not easily deviated when moving in the cylinder 130.

Referring to fig. 1, 2 and 4, the adjusting mechanism 20 includes a support assembly 210, a threaded rod 220, an i-shaped block 230 and a sealing assembly 240, the buffer assembly 140 slidably penetrates through the support assembly 210, the threaded rod 220 is threadedly inserted into the middle of the support assembly 210, the i-shaped block 230 is connected to one end of the threaded rod 220, specifically, the i-shaped block 230 is fixedly connected to one end of the threaded rod 220 by welding, the sealing assembly 240 is rotatably connected to the outside of the i-shaped block 230, the sealing assembly 240 is attached to the plastic injection layer 120, the sealing assembly 240 can block the exhaust hole 160, the threaded rod 220 and the i-shaped block 230 are provided, the distance between the sealing assembly 240 and the plastic injection layer 120 can be adjusted, and the exhaust pressure of the air compressor can be adjusted according to requirements.

In some embodiments, adjustment mechanism 20 further includes a handle 250, wherein handle 250 is attached to the other end of threaded rod 220, and wherein handle 250 is configured to facilitate rotation of threaded rod 220 by a person.

Referring to fig. 3, 4 and 5, the supporting assembly 210 includes a supporting plate 211, a guide hole 213 is formed in an inner surface of the supporting plate 211, the guide rail 141 slidably penetrates through the guide hole 213, the first spring 142 is located between the supporting plate 211 and the cylinder 130, the second spring 143 is located between the supporting plate 211 and the supporting plate 144, a threaded hole 212 is formed in the inner surface of the supporting plate 211, the threaded hole 212 is in threaded connection with the threaded rod 220, the guide hole 213 is formed so that the guide rail 141 can pass through the supporting plate 211, the supporting plate 211 can move on the guide rail 141, the first spring 142 and the second spring 143 are provided, the supporting plate 211 can be buffered by an elastic force of the springs, and a tendency of the supporting plate 211 falling downward is reduced.

Referring to fig. 2, 4 and 6, the sealing assembly 240 includes a bracket 241, an exhaust valve plate body 242 and a sealing block 243, the bracket 241 is a U-shaped structure, a clamping hole 244 is formed on an inner surface of the bracket 241, the i-shaped block 230 is rotatably connected in the clamping hole 244, the exhaust valve plate body 242 is mounted at two ends of the bracket 241, specifically, the exhaust valve plate body 242 is fixedly mounted at two ends of the bracket 241 by welding, the sealing block 243 is connected to one side of the exhaust valve plate body 242, specifically, the sealing block 243 is fixedly connected to one side of the exhaust valve plate body 242 by gluing, the sealing block 243 is a rubber block, the clamping hole 244 is formed, the i-shaped block 230 can be rotatably connected with the bracket 241, the i-shaped block 230 can only drive the exhaust valve plate body 242 to move up and down by the bracket 241 when moving up and down while rotating, and cannot rotate, the exhaust valve plate body 242 is provided, the exhaust hole 160 is blocked, and the sealing block 243 is provided, the sealing performance between the discharge valve plate body 242 and the discharge hole 160 can be improved, so that the discharge hole 160 is not easy to leak.

In some specific embodiments, the sealing block 243 is a conical elastic structure, the sealing block 243 is in interference fit with the exhaust holes 160, the exhaust holes 160 correspond to the sealing block 243 one by one, through holes 245 are formed in the inner surface of the exhaust valve plate body 242, the cylinder 130 slidably penetrates through the through holes 245, the through holes 245 are formed in the inner surface of the exhaust valve plate body 242, the cylinder 130 slidably penetrates through the through holes 245, and the through holes 245 are formed to enable the exhaust valve plate body 242 to move on the cylinder 130.

The working principle of the device is as follows: when the air compressor works and needs to exhaust air, when the exhaust pressure of the air compressor is greater than the elastic force of the first spring 142 and the second spring 143 on the support plate 211, the air drives the sealing block 243 to move upwards at the exhaust hole 160, the sealing block 243 drives the exhaust valve plate body 242 to move upwards, so that the exhaust valve plate body 242 is separated from the plastic injection layer 120, when the air compressor does not need to exhaust air, the elastic force of the first spring 142 and the second spring 143 drives the support plate 211 to move downwards slowly, the support plate 211 drives the i-shaped block 230 to move downwards through the threaded rod 220, the i-shaped block 230 drives the exhaust valve plate body 242 and the sealing block 243 to move downwards through the bracket 241, the exhaust hole 160 is blocked by the exhaust valve plate body 242, when the exhaust valve plate body 242 flaps the valve plate body 110, the plastic injection layer 120 reduces noise generated by slapping and absorbs a part of noise, the first spring 142 and the second spring 143 can also reduce the falling force of the exhaust valve sheet body 242, reduce the noise decibel, meanwhile, people can drive the threaded rod 220 to rotate through the handle 250, the threaded rod 220 can drive the I-shaped block 230 to move up and down through the threaded hole 212, the I-shaped block 230 can drive the exhaust valve plate body 242 to move up and down through the support 241, the distance between the exhaust valve plate body 242 and the plastic spraying layer 120 can be adjusted, the exhaust pressure of the air compressor can be adjusted according to actual requirements, thereby achieving the purpose of reducing the noise generated by the exhaust valve plate beating valve plate, reducing the noise generated during beating and absorbing a part of the noise by carrying out the plastic spraying treatment in the area of and near the exhaust valve plate beating valve plate, through setting up buffer structure, slow down the dynamics of discharge valve piece whereabouts, reduce the decibel of noise, reduce air compressor and produce the injury of noise to people.

It should be noted that the specific model specifications of the valve plate body 110, the plastic-sprayed layer 120, the first spring 142, the second spring 143, the i-shaped block 230, and the exhaust valve plate body 242 need to be determined by model selection according to the actual specification of the device, and the specific model selection calculation method adopts the prior art in the field, and therefore detailed description is omitted.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A spraying plastics exhausting noise-reducing structure of air compressor is characterized by comprising

The elastic mechanism (10) comprises a valve plate body (110), a plastic spraying layer (120), a cylinder (130) and a buffer assembly (140), wherein the plastic spraying layer (120) is arranged on one side of the valve plate body (110), the cylinder (130) is arranged to be symmetrically distributed in two ways, the cylinder (130) is connected to one side of the plastic spraying layer (120), the buffer assembly (140) is connected to the inside of the cylinder (130) in a sliding manner, exhaust holes (160) are formed in the inner surfaces of the valve plate body (110) and the plastic spraying layer (120), and the exhaust holes (160) are located on the peripheral side of the cylinder (130);

adjustment mechanism (20), adjustment mechanism (20) are including supporting component (210), threaded rod (220), I-shaped piece (230) and seal assembly (240), buffer component (140) slide run through in supporting component (210), threaded rod (220) screw run through in supporting component (210) middle part, I-shaped piece (230) connect in threaded rod (220) one end, seal assembly (240) rotate connect in I-shaped piece (230) outside, seal assembly (240) with plastic spraying layer (120) laminate mutually, seal assembly (240) can block up exhaust hole (160).

2. The plastic spraying exhaust noise reduction structure of an air compressor according to claim 1, wherein the buffer assembly (140) comprises a guide rail (141), a first spring (142), a second spring (143), a support plate (144) and a slide rail (145), the guide rail (141) is slidably connected to the inside of the cylinder (130), the inner side of the cylinder (130) is in clearance fit with the outer surface of the guide rail (141), the first spring (142) and the second spring (143) are sleeved on the outer surface of the guide rail (141), the support plate (144) is installed at one end of the guide rail (141), and the slide rail (145) is connected to two sides of the guide rail (141).

3. The plastic spraying, exhausting and noise reducing structure of the air compressor as claimed in claim 2, wherein the slide rail (145) is an arc-shaped structure, sliding grooves (150) are formed in two sides of the inner wall of the cylinder (130), and the slide rail (145) is slidably connected to the sliding grooves (150).

4. The plastic injection exhaust noise reduction structure of an air compressor according to claim 2, wherein the support assembly (210) comprises a support plate (211), a guide hole (213) is formed in an inner surface of the support plate (211), and the guide rail (141) slidably penetrates through the guide hole (213).

5. The plastic injection exhaust noise reduction structure of an air compressor as claimed in claim 4, wherein said first spring (142) is located between said support plate (211) and said cylinder (130), and said second spring (143) is located between said support plate (211) and said support plate (144).

6. The plastic spraying exhaust noise reduction structure of an air compressor as claimed in claim 4, wherein the support plate (211) has a threaded hole (212) formed in an inner surface thereof, and the threaded hole (212) is in threaded connection with the threaded rod (220).

7. The plastic-injection exhaust noise reduction structure of an air compressor according to claim 1, wherein the sealing assembly (240) comprises a support (241), an exhaust valve plate body (242) and a sealing block (243), the support (241) is of a U-shaped structure, a clamping hole (244) is formed in the inner surface of the support (241), the I-shaped block (230) is rotatably connected in the clamping hole (244), the exhaust valve plate body (242) is mounted at two ends of the support (241), and the sealing block (243) is connected to one side of the exhaust valve plate body (242).

8. The plastic-injection exhaust and noise reduction structure of an air compressor according to claim 7, wherein the sealing block (243) is of a conical elastic structure, the sealing block (243) is in interference fit with the exhaust holes (160), and the exhaust holes (160) correspond to the sealing block (243) one by one.

9. The plastic-spraying exhaust noise reduction structure of an air compressor as claimed in claim 7, wherein the inner surface of the exhaust valve plate body (242) is provided with a through hole (245), and the cylinder (130) slidably penetrates through the through hole (245).

10. The plastic injection exhaust noise reduction structure of an air compressor as claimed in claim 1, wherein said adjusting mechanism (20) further comprises a handle (250), said handle (250) being connected to the other end of said threaded rod (220).