Air pump with lower noise

Abstract

The air pump with the lower noise comprises an upper cover, a lower cover, a cylinder body, a motor installation base and a motor, a fixing screw sequentially penetrates through the upper cover, the lower cover, the cylinder body, the motor installation base and the motor from top to bottom to be fixedly connected, an air inlet cavity and an air outlet cavity are formed in an inner cavity of the upper cover at intervals, and the lower cover extends outwards to be provided with a protruding part. An air inlet nozzle and an air outlet nozzle are arranged on the bottom face of the protruding part, a one-way valve block is further arranged between the upper cover and the lower cover, a rubber cup is installed on the cylinder body, an air inlet cavity and an air outlet cavity penetrate through the one-way valve block to be communicated with an inner cavity of the rubber cup, the bottom of the rubber cup is connected with an eccentric swing frame assembly, and the lower end of the eccentric swing frame assembly is connected with the output end of a motor. The motor is used for driving the eccentric swing frame assembly to extrude the rubber cups for pumping. The utility model has the advantages of simpler and more convenient assembly, lower production and manufacturing cost, lower use noise and longer service life.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm pump technology, and in particular to an air pump with lower noise. Background Technology

[0002] Traditional air pumps (such as small piston or diaphragm air pumps) often use umbrella-type one-way valves (intake and exhaust valves) made of metal or hard plastic. This structure has the following disadvantages:

[0003] Loud noise: When the umbrella pin opens and closes, its head violently strikes the valve seat or limiting structure, producing a noticeable "clattering" sound, which is one of the main noise sources of the air pump.

[0004] The structure is relatively complex: umbrella pins usually require independent valve seats, springs (or rely on their own elasticity to reset), limit structures, etc., with a large number of parts and relatively complicated assembly.

[0005] Frequent impacts can cause fatigue damage to the valve head, valve seat, or spring, affecting its lifespan and sealing performance.

[0006] There is a need for a quieter air pump that can solve the problems mentioned above. Utility Model Content

[0007] This invention provides a quieter air pump. By technically modifying existing air pumps, it solves the problems of complex structure and high noise levels in existing air pumps.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A quieter air pump includes an upper cover, a lower cover, a cylinder, a motor mounting base, and a motor. Fixing screws pass through the upper cover, lower cover, cylinder, motor mounting base, and motor sequentially from top to bottom for secure connection. An air inlet chamber and an air outlet chamber are spaced apart within the inner cavity of the upper cover. A protrusion extends outward from the lower cover, with an air inlet nozzle and an air outlet nozzle on the bottom surface of the protrusion. The air inlet nozzle and the air inlet chamber are connected, as are the air outlet nozzle and the air outlet chamber. A one-way valve is also provided between the upper and lower covers. A rubber cup is mounted on the cylinder. The air inlet chamber and the air outlet chamber communicate with the inner cavity of the rubber cup through the one-way valve. The bottom of the rubber cup is connected to an eccentric swing frame assembly, and the lower end of the eccentric swing frame assembly is connected to the motor output end. The motor drives the eccentric swing frame assembly to compress the rubber cup for pumping.

[0010] Preferably, the lower cover has a plurality of vent holes at a position relative to the inner cavity of the rubber cup, and a one-way valve plate has a through hole at a position relative to the rubber cup. A first one-way valve plate structure is provided on the inner side of the through hole extending toward the vent hole, and the bottom surface of the first one-way valve plate structure covers the vent hole.

[0011] Preferably, the one-way valve plate, the lower cover, and the cylinder body have air inlets that are directly opposite each other. The upper end of the air inlet is connected to the air inlet chamber, and the lower end of the air inlet is connected to the inner cavity of the motor mounting base.

[0012] Preferably, the cylinder body is further provided with an air outlet in the middle, and the rubber cup is provided with a second one-way valve plate structure at the position covered by the air outlet. The inner cavity of the motor mounting base is unidirectionally connected to the inner cavity of the rubber cup through the air outlet.

[0013] Preferably, the upper outer side of the rubber cup is provided with a sloping boss structure at the mounting surface of the cylinder body.

[0014] Preferably, the eccentric swing frame assembly includes an eccentric component, a steel ball, a rotating shaft, and a swing frame. The bottom of the eccentric component is provided with a motor shaft mounting hole, through which the output shaft of the motor assembly passes. The upper part of the eccentric component is also provided with a rotating shaft mounting hole, in which a steel ball is installed. The swing frame is provided above the eccentric component, and a rotating shaft is fixed at the bottom of the swing frame. The rotating shaft is installed in the rotating shaft mounting hole, and the upper end of the swing frame is connected to a rubber cup.

[0015] Preferably, a positioning groove is provided on the outer periphery of the upper surface of the cylinder, and a positioning piece is provided on the upper end of the rubber cup protruding outward, the positioning piece being fitted into the positioning groove.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model features a one-way valve plate between the upper and lower covers. The inner cavity of the rubber cup is connected to the air outlet chamber in one direction through the first one-way valve plate structure on the one-way valve plate. This application replaces the existing umbrella-shaped structure with a single one-way valve plate as the one-way valve structure. This utility model is easier and more convenient to assemble, eliminates the need for ultrasonic testing in mold production, reduces manufacturing costs, and has lower noise and longer service life.

[0018] The present invention relates to a rubber cup that is installed on a cylinder body. The outer side of the rubber cup is provided with a sloping protrusion, which reduces the contact area between the rubber cup and the cylinder body, reduces friction, and reduces noise. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the one-way valve plate and the lower cover of this utility model;

[0022] Figure 4This is a schematic diagram of the eccentric swing frame assembly structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the cylinder body and rubber cup structure of this utility model;

[0024] Reference numerals: 1. Upper cover; 2. Lower cover; 21. Air inlet; 22. Air outlet; 23. Exhaust port; 3. Cylinder block; 31. Air outlet; 32. Positioning slot; 4. Motor mounting base; 5. Motor; 6. Fixing screw; 7. One-way valve plate; 7. Through hole; 71. First one-way valve plate structure; 72. Air inlet; 73. Rubber cup; 8. Sloping boss structure; 81. Second one-way valve plate structure; 82. Positioning plate; 83. Eccentric swing frame assembly; 9. Eccentric part; 91. Steel ball; 92. Rotating shaft; 93. Swing frame; 94. Detailed Implementation

[0025] The specific content of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0026] Please see Figure 1-5 As shown, this utility model provides a quieter air pump, including an upper cover 1, a lower cover 2, a cylinder 3, a motor mounting base 4, and a motor 5. Fixing screws 6 pass through the upper cover 1, lower cover 2, cylinder 3, motor mounting base 4, and motor 5 sequentially from top to bottom for fixed connection. An air inlet chamber and an air outlet chamber are spaced apart within the inner cavity of the upper cover 1. A protrusion extends outward from the lower cover 2, with an air inlet nozzle 21 and an air outlet nozzle 22 on the bottom surface of the protrusion. The air inlet nozzle 21 is connected to the air inlet chamber, and the air outlet nozzle 22 is connected to the air outlet chamber. A one-way valve 7 is also provided between the upper cover 1 and the lower cover 2. A rubber cup 8 is installed on the cylinder 3. The air inlet chamber and air outlet chamber pass through the one-way valve 7 and communicate with the inner cavity of the rubber cup 8. The bottom of the rubber cup 8 is connected to an eccentric swing frame assembly 9, and the lower end of the eccentric swing frame assembly 9 is connected to the output end of the motor 5. The motor 5 is used to drive the eccentric swing frame assembly 9 to squeeze the rubber cup 8 for pumping.

[0027] Furthermore, in order to enable the one-way valve plate 7 to control the exhaust chamber and the exhaust nozzle 22 to exhaust in one direction, a number of exhaust holes 23 are provided on the lower cover 2 relative to the inner cavity of the rubber cup 8. The one-way valve plate 7 is provided with a through hole 71 relative to the position of the rubber cup 8. A first one-way valve plate structure 72 is provided on the inner side of the through hole 71 in the direction of the exhaust hole 23. The bottom surface of the first one-way valve plate structure 72 covers the exhaust hole 23.

[0028] Furthermore, in order to allow the air entering through the air inlet 21 to enter the motor mounting base 4, the one-way valve plate 7, the lower cover 2, and the cylinder body 3 are provided with air inlets 73 that are directly opposite each other. The upper end of the air inlet 73 is connected to the air inlet chamber, and the lower end of the air inlet 73 is connected to the inner cavity of the motor mounting base 4.

[0029] Furthermore, in order to enable the rubber cup 8 to have unidirectional air intake, an air outlet 31 is provided in the middle of the cylinder body 3, and a second one-way valve plate structure 82 is provided in the position of the rubber cup 8 relative to the air outlet 31. The inner cavity of the motor mounting base 4 is unidirectionally connected to the inner cavity of the rubber cup 8 through the air outlet 31.

[0030] Air inside the motor mounting base 4 can enter the inner cavity of the rubber cup 8 in one direction. The eccentric swing frame assembly 9 squeezes the rubber cup 8, and the air inside the rubber cup 8 is blocked by the second one-way valve structure 82, so it will not flow back into the motor mounting base 4. The air inside the rubber cup 8 pushes up the first one-way valve structure 72 and enters the air outlet chamber, and is discharged from the air outlet 22.

[0031] Furthermore, a sloping boss structure 81 is provided on the upper outer side of the rubber cup 8 relative to the mounting surface of the cylinder 3. The sloping boss structure 81 on the outer side of the rubber cup 8 reduces the contact area between the rubber cup 8 and the cylinder 3, reduces friction, and reduces noise.

[0032] Furthermore, the eccentric swing frame assembly 9 includes an eccentric component 91, a steel ball 92, a rotating shaft 93, and a swing frame 94. The bottom of the eccentric component 91 is provided with a motor shaft mounting hole, through which the output shaft of the motor 5 assembly passes. The upper part of the eccentric component 91 is also provided with a rotating shaft mounting hole, in which the steel ball 92 is installed. The swing frame 94 is provided above the eccentric component 91, and the bottom of the swing frame 94 is fixed with the rotating shaft 93. The rotating shaft 93 is installed in the rotating shaft mounting hole, and the upper end of the swing frame 94 is connected to the rubber cup 8.

[0033] Furthermore, to achieve a better sealing effect, a positioning groove 32 is provided on the outer periphery of the upper surface of the cylinder body 3, and a positioning piece 83 is provided on the upper end of the rubber cup 8 protruding outward, the positioning piece 83 being fitted into the positioning groove 32. The cylinder body 3 is installed more stably, and when the lower cover 2 is connected to the cylinder body 3, it can clamp the rubber cup 8.

[0034] This utility model provides a one-way valve plate 7 between the upper cover 1 and the lower cover 2. The inner cavity of the rubber cup 8 is connected to the air outlet chamber in one direction through the first one-way valve plate structure 72 provided on the one-way valve plate 7. This application replaces the existing umbrella-shaped structure with a whole piece of one-way valve plate 7 as the one-way valve structure, which makes assembly simpler and more convenient, and also reduces noise and extends service life.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

[0036] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0037] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A quieter air pump, characterized in that, The system includes an upper cover, a lower cover, a cylinder, a motor mounting base, and a motor. Fixing screws pass through the upper cover, lower cover, cylinder, motor mounting base, and motor sequentially from top to bottom for secure connection. An air inlet and an air outlet are spaced apart within the upper cover's inner cavity. A protrusion extends outward from the lower cover, with an air inlet and an air outlet on the bottom surface of the protrusion. The air inlet and air outlet are connected to the air inlet and air outlet, respectively. A one-way valve is also provided between the upper and lower covers. A rubber cup is mounted on the cylinder. The air inlet and air outlet communicate with the inner cavity of the rubber cup through the one-way valve. The bottom of the rubber cup is connected to an eccentric swing frame assembly, and the lower end of the eccentric swing frame assembly is connected to the motor output. The motor drives the eccentric swing frame assembly to compress the rubber cup for pumping.

2. The air pump with lower noise according to claim 1, characterized in that, The lower cover has several vent holes positioned relative to the inner cavity of the rubber cup. A one-way valve plate has a through hole positioned relative to the rubber cup. A first one-way valve plate structure extends from the inner side of the through hole toward the vent hole, and the bottom surface of the first one-way valve plate structure covers the vent hole.

3. The air pump with lower noise according to claim 1, characterized in that, The one-way valve plate, the lower cover, and the cylinder body are provided with air inlets that are positioned opposite each other. The upper end of the air inlet is connected to the air inlet chamber, and the lower end of the air inlet is connected to the inner cavity of the motor mounting base.

4. The air pump with lower noise according to claim 1, characterized in that, The cylinder body is also provided with an air outlet in the middle. The rubber cup is provided with a second one-way valve plate structure at the position covered by the air outlet. The inner cavity of the motor mounting base is connected to the inner cavity of the rubber cup in one direction through the air outlet.

5. A quieter air pump according to claim 1, characterized in that, The upper outer side of the rubber cup is provided with a sloping boss structure at the mounting surface of the cylinder body.

6. A quieter air pump according to claim 1, characterized in that, The eccentric swing frame assembly includes an eccentric component, steel balls, a rotating shaft, and a swing frame. The bottom of the eccentric component is provided with a motor shaft mounting hole, through which the output shaft of the motor assembly passes. The upper part of the eccentric component is also provided with a rotating shaft mounting hole, in which steel balls are installed. The swing frame is provided above the eccentric component, and a rotating shaft is fixed at the bottom of the swing frame. The rotating shaft is installed in the rotating shaft mounting hole, and the upper end of the swing frame is connected to a rubber cup.

7. A quieter air pump according to claim 1, characterized in that, The cylinder body has a positioning groove on its outer periphery and a positioning piece protruding outward from the upper end of the rubber cup. The positioning piece is fitted into the positioning groove.

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