Air pump with noise reduction cavity

Abstract

The utility model relates to the technical field of machinery. An air pump with a noise reduction cavity comprises an air pump body, the air pump body comprises an air inlet and an air outlet, and the air pump further comprises the noise reduction cavity; the silencing cavity comprises a silencing base, a sealing gasket, a clamping plate and a silencing upper cover; the sealing gasket and the clamping plate are connected through a first connecting bolt to form a supporting plate assembly, an inner cavity of the silencing cavity is divided into an upper cavity and a lower cavity through the supporting plate assembly, a partition plate is arranged on the silencing base, and the lower cavity is divided into a first cavity and a second cavity through the partition plate. A vent hole in butt joint with the first cavity and the second cavity is formed in the partition plate; the silencing upper cover is provided with an air inlet connector, the air outlet is in butt joint with the first cavity of the silencing base through a connecting pipeline, and the silencing base is provided with an exhaust connector in butt joint with the second cavity. The noise reduction effect is achieved by optimizing the structure of the noise reduction cavity.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to an air pump. Background Art

[0002] The air pump generates noise during operation. Noise reduction of the air pump has always been one of the optimization directions in the research and development process of the air pump.

[0003] In the current noise reduction structures for air pumps, some air pumps select external mufflers and other components as noise reduction means, or use noise reduction materials such as sponges as noise reduction means. However, such noise reduction structures have poor noise reduction effects. Summary of the Utility Model

[0004] In view of the problems existing in the prior art, the utility model provides an air pump with a built-in sound-absorbing cavity to solve at least one of the above technical problems.

[0005] The technical solution of the utility model is: an air pump with a built-in sound-absorbing cavity, including an air pump body, the air pump body includes an air inlet and an air outlet, and is characterized in that it further includes a sound-absorbing cavity;

[0006] The sound-absorbing cavity includes a sound-absorbing base, a sealing gasket, a clamping plate, and a sound-absorbing upper cover arranged in sequence from bottom to top;

[0007] The sealing gasket and the clamping plate are connected by a first connecting bolt to form a support plate assembly;

[0008] A shock-absorbing foot is clamped between the support plate assembly and the air pump body, and a limiting hole for longitudinally sliding and connecting the screw of the first connecting bolt is opened at the bottom of the air pump body;

[0009] The support plate assembly divides the inner cavity of the sound-absorbing cavity into an upper chamber and a lower chamber, and the air pump body is installed inside the upper chamber;

[0010] A partition is arranged on the sound-absorbing base, the partition divides the lower chamber into a first chamber and a second chamber, and a ventilation hole for connecting the first chamber and the second chamber is opened on the partition;

[0011] An air inlet joint for connecting the upper chamber and the air inlet is opened on the sound-absorbing upper cover, the air outlet is connected and communicated with the first chamber of the sound-absorbing base through a connecting pipe, and an exhaust joint for connecting the second chamber is opened on the sound-absorbing base.

[0012] The utility model optimizes the structure of the sound-absorbing cavity. Through the arrangement of multiple chambers in the sound-absorbing base, it is convenient for the step-by-step sound-absorbing and noise-reducing treatment of the airflow during the conduction process. By means of cutting the space, the effect of reducing noise is achieved. Through the arrangement of shock-absorbing feet and the first connecting bolts, the amplitude of the reciprocating motion of the air pump body is reduced, so that the shock-absorbing effect is further improved, and the noise caused by vibration is reduced to a certain extent.

[0013] Further preferably, the materials of the sound-absorbing upper cover and the sound-absorbing base are plastic or metal parts. The materials are not limited, and the sound-absorbing effect can also be achieved.

[0014] Further preferably, the sound-absorbing base, the sealing gasket and the sound-absorbing upper cover are detachably connected through a second connecting member.

[0015] The second connecting member is a screw. A first threaded hole for threadedly connecting the screw is provided on the sound-absorbing upper cover, and first connecting holes for passing through the screw are provided on the sealing gasket and the sound-absorbing base.

[0016] It is convenient to realize detachable assembly.

[0017] Further preferably, the sound-absorbing base, the sealing gasket and the sound-absorbing upper cover are provided with first connecting holes for passing through the second connecting member.

[0018] Further preferably, the bottom of the air pump body is clamped with the top of the shock-absorbing foot, and the bottom of the shock-absorbing foot is clamped with the support plate assembly.

[0019] Further preferably, three shock-absorbing feet are provided, and the three shock-absorbing feet are arranged around the periphery of the first connecting bolt.

[0020] Further preferably, three clamping holes for clamping the shock-absorbing feet are provided on both the sealing gasket and the clamping plate.

[0021] Further preferably, air holes are provided on the clamping plate, and vertical pipes are fixedly connected to the air holes;

[0022] The connecting pipeline is sleeved around the periphery of the vertical pipe and is butt-connected and conducted with the vertical pipe;

[0023] The sealing gasket is provided with docking holes that are butt-connected and conducted with the air holes.

[0024] Further preferably, an arc-shaped bending portion for avoiding the first connecting bolt is provided on the partition plate, and an extending portion extending outward is provided on the periphery of the arc-shaped bending portion.

[0025] While facilitating the avoidance of the first connecting bolt, the strength is ensured.

[0026] Further preferably, the sound-absorbing base, the sealing gasket and the clamping plate are detachably connected by second connecting screws;

[0027] The sealing gasket and the clamping plate are provided with second mounting holes through which the second connecting screws pass;

[0028] The sound-absorbing base is provided with second threaded holes for threadedly connecting the second connecting screws.

[0029] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0030] By optimizing the air pump diversion structure, the present utility model achieves the effect of reducing noise by cutting the space. By optimizing the air pump pump body fixing structure, the amplitude of the reciprocating motion of the air pump pump body is slowed down, so that the shock absorption effect is further improved, and thus the noise caused by vibration is reduced to a certain extent.

[0031] During operation, external air flow enters from the air inlet joint and reaches the upper chamber. The air pump pump body moves from the middle, and the shock absorption feet are used to slow down the attenuation of vibration. Moreover, since the air pump pump body is limited by the first connecting bolts on the clamping plate, the amplitude of the reciprocating motion is slowed down, so that the shock absorption effect is further improved, and thus the noise caused by vibration is reduced to a certain extent. Secondly, the air pump moves from the middle, the air flow enters the air inlet of the air pump from the upper chamber, through the movement of the air pump, the air flow passes through the connecting pipe and reaches the lower chamber. The air flow passes through the first chamber in the lower chamber, passes through the ventilation holes, reaches the second chamber, and flows out from the exhaust interface, thus forming a sound-absorbing cavity. By cutting the space of the cavity, the sound-absorbing effect is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of Specific Embodiment 1 of the present utility model;

[0033] Figure 2 is a side view of Specific Embodiment 1 of the present utility model;

[0034] Figure 3 is a top view of Specific Embodiment 1 of the present utility model;

[0035] Figure 4 is a top view of the sound-absorbing base of Specific Embodiment 1 of the present utility model;

[0036] Figure 5 is a top view of the clamping plate of Specific Embodiment 1 of the present utility model;

[0037] Figure 6 is a top view of the sealing gasket of Specific Embodiment 1 of the present utility model;

[0038] Figure 7It is the bottom view of the muffling upper cover in the first specific embodiment of the present utility model.

[0039] In the figure, 1 is the muffling upper cover, 2 is the air pump body, 3 is the second connecting screw, 5 is the air inlet joint, 6 is the connecting pipeline, 7 is the shock-absorbing foot, 8 is the clamping plate, 9 is the sealing gasket, 10 is the exhaust joint, 11 is the upper chamber, 12 is the air inlet, 13 is the lead wire, 14 is the second connecting member, 16 is the muffling base, 17 is the air outlet, 18 is the first connecting bolt, 19 is the first connecting hole, 20 is the first threaded hole, 21 is the second threaded hole, 22 is the second mounting hole, 23 is the lower chamber, 25 is the clamping hole, 26 is the first mounting hole, 27 is the lead-through hole, 28 is the ventilation hole, 29 is the upper cover air hole, 30 is the docking hole, and 31 is the air hole. Specific Embodiment

[0040] See Figures 1 to 7 , in the first specific embodiment, an air pump with a built-in muffling cavity includes an air pump body 2. The air pump body 2 includes an air inlet 12 and an air outlet 17, and also includes a muffling cavity; the muffling cavity includes a muffling base 16, a sealing gasket 9, a clamping plate 8, and a muffling upper cover 1 arranged in sequence from bottom to top; the sealing gasket 9 and the clamping plate 8 are connected by a first connecting bolt 18 to form a support plate assembly; a shock-absorbing foot 7 is clamped between the support plate assembly and the air pump body 2, and a limiting hole for longitudinally sliding and connecting the screw of the first connecting bolt 18 is opened at the bottom of the air pump body 2; the support plate assembly divides the inner cavity of the muffling cavity into an upper chamber 11 and a lower chamber 23; the air pump body 2 is installed inside the upper chamber 11; a partition is provided on the muffling base 16, and the partition divides the lower chamber 23 into a first chamber and a second chamber, and a ventilation hole 28 for docking the first chamber and the second chamber is opened on the partition; an air inlet joint 5 for docking the upper chamber and the air inlet is opened on the muffling upper cover 1, the air outlet 17 is connected and communicated with the first chamber of the muffling base 16 through a connecting pipeline 6, and an exhaust joint 10 for docking the second chamber is opened on the muffling base 16. The present utility model optimizes the structure of the muffling cavity. Through the arrangement of multiple chambers of the muffling base 16, it is convenient for the step-by-step muffling and noise reduction treatment of the air flow during the conduction process. By means of cutting the space, the effect of reducing noise is achieved. Through the arrangement of the shock-absorbing foot and the first connecting bolt 18, the amplitude of the reciprocating motion of the air pump body 2 is reduced, so that the shock-absorbing effect is further improved, and thus the noise caused by vibration is reduced to a certain extent.

[0041] The materials of the muffling upper cover 1 and the muffling base 16 are plastic or metal parts. The materials are not limited, and the muffling effect can also be achieved. The sealing gasket is a rubber sheet.

[0042] The silencer base 16, the sealing gasket 9 and the silencer upper cover 1 are detachably connected by the second connecting member 14. This facilitates detachable assembly. The second connecting member 14 is a screw. The silencer upper cover 1 is provided with a first threaded hole 20 for threaded connection of the screw. The sealing gasket 9 and the silencer base 16 are provided with a first connecting hole 19 for passing the screw. A notch for avoiding the screw is provided at the corner of the clamping plate 8. The outer edge of the sealing gasket is clamped between the silencer base and the silencer upper cover.

[0043] The bottom of the air pump body 2 is clamped with the top of the shock-absorbing foot 7, and the bottom of the shock-absorbing foot 7 is clamped with the support plate assembly. Three shock-absorbing feet 7 are provided, and the three shock-absorbing feet 7 are arranged around the periphery of the first connecting bolt 18. The sealing gasket 9 and the clamping plate 8 are both provided with three clamping holes 25 for clamping the shock-absorbing feet 7.

[0044] A first mounting hole 26 for passing the first connecting bolt 18 is provided in the center of the clamping plate 8 and the sealing gasket 9. The screw head of the first connecting bolt 18 is located at the lower side of the sealing gasket 9, and the nut of the first connecting bolt 18 is located at the upper side of the clamping plate 8.

[0045] The clamping plate 8 is provided with an air hole 31, to which a vertical pipe is fixedly connected; the connecting pipeline 6 is sleeved on the periphery of the vertical pipe and connected to the vertical pipe; the sealing gasket 9 is provided with a docking hole 30 connected to the air hole.

[0046] The partition is provided with an arc-shaped bending portion for avoiding the first connecting bolt 18, and the periphery of the arc-shaped bending portion is provided with an extending portion extending outward, so as to facilitate avoiding the first connecting bolt 18 and ensure strength.

[0047] The silencer base 16, the sealing gasket 9 and the clamping plate 8 are detachably connected by the second connecting screw 3; the sealing gasket 9 and the clamping plate 8 are provided with a second mounting hole 22 through which the second connecting screw 3 passes; the silencer base 16 is provided with a second threaded hole 21 threadedly connected to the second connecting screw 3. The inner cavity of the silencer base 16 is provided with an inwardly extending boss, on which the second threaded hole 21 is provided, and the boss supports the sealing gasket 9 and the clamping plate 8. The second threaded hole 21 is located between adjacent first mounting holes 26.

[0048] The sealing gasket 9 and the muffler base 16 are both provided with lead-out holes 27 corresponding to each other and used for connecting the lead-out wire 13 of the air pump body 2. A sealing ring is installed between the lead-out hole and the lead-out wire.

[0049] During operation, the external air flow enters from the air inlet joint 5 and reaches the upper chamber. The air pump body 2 acts by moving from the middle, and the shock absorber feet 7 are used to slow down the attenuation of vibration. Moreover, since the air pump body 2 is limited by the first connecting bolt 18 on the clamping plate 8, the amplitude of the reciprocating motion is reduced, so that the shock absorption effect is further improved, and the noise caused by vibration is reduced to a certain extent. Secondly, the air pump acts by moving from the middle, and the air flow enters the air inlet 12 of the air pump from the upper chamber 11. Through the action of the air pump movement, the air flow passes through the connecting pipe and reaches the lower chamber 23. The air flow passes through the first chamber in the lower chamber 23, passes through the ventilation holes, reaches the second chamber, and flows out from the exhaust interface, thus forming a sound-absorbing cavity. By the method of cutting the space of the cavity, the sound-absorbing effect is further improved.

[0050] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An air pump with a built-in sound-absorbing cavity, comprising an air pump body, the air pump body including an air inlet and an air outlet, characterized in that, It further includes a sound-absorbing cavity; The sound-absorbing cavity includes a sound-absorbing base, a sealing gasket, a clamping plate, and a sound-absorbing upper cover that are sequentially arranged from bottom to top; The sealing gasket and the clamping plate are connected by a first connecting bolt to form a support plate assembly; A shock-absorbing foot is clamped between the support plate assembly and the air pump body, and a limiting hole for longitudinally sliding and connecting the screw of the first connecting bolt is provided at the bottom of the air pump body; The support plate assembly divides the inner cavity of the sound-absorbing cavity into an upper chamber and a lower chamber, and the air pump body is installed inside the upper chamber; A partition is provided on the sound-absorbing base, the partition divides the lower chamber into a first chamber and a second chamber, and a ventilation hole for connecting the first chamber and the second chamber is provided on the partition; An air inlet joint for connecting the upper chamber and the air inlet is provided on the sound-absorbing upper cover, the air outlet is connected to the first chamber of the sound-absorbing base through a connecting pipe, and an exhaust joint for connecting the second chamber is provided on the sound-absorbing base; 2. The air pump with a built-in sound-absorbing cavity according to claim 1, wherein: The materials of the sound-absorbing upper cover and the sound-absorbing base are plastic or metal parts; 3. The air pump with a built-in soundproof cavity according to claim 1, characterized in that: The sound-absorbing base, the sealing gasket, and the sound-absorbing upper cover are detachably connected by a second connecting member; The second connecting member is a screw, a first threaded hole for threadedly connecting the screw is provided on the sound-absorbing upper cover, and first connecting holes for passing through the screw are provided on the sealing gasket and the sound-absorbing base; 4. The air pump with a built-in sound insulation cavity according to claim 3, characterized in that: The sound-absorbing base, the sealing gasket, and the sound-absorbing upper cover are provided with first connecting holes for passing through the second connecting member; 5. The air pump with a built-in sound-absorbing cavity according to claim 1, wherein: The bottom of the air pump body is clamped with the top of the shock-absorbing foot, and the bottom of the shock-absorbing foot is clamped with the support plate assembly; 6. The air pump with a built-in sound insulation cavity according to claim 1, characterized in that: There are three shock-absorbing feet, and the three shock-absorbing feet surround the periphery of the first connecting bolt; 7. The air pump with a built-in sound-absorbing cavity according to claim 5, wherein: Three clamping holes for clamping the shock-absorbing feet are provided on both the sealing gasket and the clamping plate; 8. The air pump with a built-in sound insulation cavity according to claim 1, characterized in that: A gas hole is provided on the clamping plate, and a vertical pipe is fixedly connected to the gas hole; The connecting pipe is sleeved on the periphery of the vertical pipe and is connected and communicated with the vertical pipe; A docking hole for connecting and communicating with the gas hole is provided on the sealing gasket; 9. The air pump with a built-in sound insulation cavity according to claim 1, characterized in that: An arc-shaped bending part for avoiding the first connecting bolt is provided on the partition, and an extending part extending outwards is provided on the periphery of the arc-shaped bending part; 10. The air pump with a built-in sound-absorbing cavity according to claim 1, characterized in that: The sound-absorbing base, the sealing gasket, and the clamping plate are detachably connected by a second connecting screw; Second mounting holes for passing through the second connecting screw are provided on the sealing gasket and the clamping plate; A second threaded hole for threadedly connecting the second connecting screw is provided on the sound-absorbing base;

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