A silent pump with automatic exhaust function

Abstract

The utility model discloses a silent pump with automatic exhaust function, including a motor and a pump head connected with the motor, the pump head including an upper cover and a bottom cover, and a leather cup, a cylinder body and a swing frame arranged between the upper cover and the bottom cover, the upper cover is provided with an air outlet, the bottom cover is provided with an air filling and exhaust port, the cylinder body is arranged below the upper cover, the leather cup is installed on the cylinder body, the upper part of the leather cup is nested and connected with the upper cover, the swing frame is arranged below the cylinder body, the lower part of the leather cup is connected with the swing frame, the cylinder body and the bottom cover define a pump chamber, a rotatable valve body is arranged in the pump chamber, the valve body is eccentrically connected with the swing frame, the output shaft of the motor extends into the pump chamber and is connected with the valve body, the valve body is provided with a valve chamber, the valve chamber is provided with an air guide hole connected with the pump chamber air path, and an air inlet hole for introducing external gas, and a blocking block is movably arranged in the valve chamber. The utility model realizes the air filling and exhaust function at a low cost, simplifies the structure, and greatly reduces the noise in use.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a silent pump with automatic exhaust function. Background Art

[0002] Vacuum pumps are widely used in medical equipment, instrumentation, consumer electronics, optical equipment and other scenarios. Most existing vacuum pumps only have exhaust functions, but no inflation functions. Although there are vacuum pumps with inflation functions on the market, the valve plate and the shank are indispensable components of these vacuum pumps, which results in a large number of overall structural parts and a relatively complex structure. Not only is the cost high, but the shank is prone to produce a lot of noise when working. Therefore, it is necessary to design a vacuum pump with inflation and exhaust functions, low cost and extremely low noise. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a silent pump with an automatic exhaust function.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides a silent pump with an automatic exhaust function, comprising a motor and a pump head connected to the motor, the pump head comprising an upper cover and a bottom cover, and a leather cup, a cylinder body and a swing frame arranged between the upper cover and the bottom cover, the upper cover is provided with an air outlet, the bottom cover is provided with an air filling and exhaust port, the cylinder body is arranged below the upper cover, the leather cup is mounted on the cylinder body, the upper part of the leather cup is nested and connected with the upper cover, the swing frame is arranged below the cylinder body, the lower part of the leather cup is connected with the swing frame, the cylinder body and the bottom cover define a pump cavity, a rotatable valve body is arranged in the pump cavity, the valve body is eccentrically connected to the swing frame, and the output shaft of the motor extends into the pump cavity. And connected with the valve body, the valve body is provided with a valve cavity, the valve cavity is provided with an air guide hole connected with the pump cavity air path, and an air inlet hole for introducing external gas, and a blocking block is movably arranged in the valve cavity, when the motor is working, the blocking block blocks the air guide hole under the action of centrifugal force, and at the same time, the motor drives the lower part of the leather cup to move, so that the gas enters from the inflation and exhaust port through the pump cavity to reach the leather cup, and is pressurized by the leather cup, and the pressurized gas rushes out from the upper part of the leather cup and the nested part of the upper cover, and is discharged from the air outlet, when the motor stops working, the air guide hole, the air inlet hole, the pump cavity and the inflation and exhaust port form an air path.

[0006] Furthermore, the leather cup is an elastic component, and the leather cup includes a dividing flat plate portion, a nested enclosure portion extending upward along the upper surface of the dividing flat plate portion, and a bowl portion extending downward along the lower surface of the dividing flat plate portion, the nested enclosure portion corresponds to the position of the bowl portion, the bowl portion is provided with an elastic diaphragm, and the elastic diaphragm has an air intake opening. When the air intake opening is opened, the nested enclosure portion is communicated with the bowl portion, and the bowl portion is connected to the swing frame. The bottom of the upper cover is provided with a columnar portion nested and connected to the nested enclosure portion; when subjected to the impact force of the gas pressurized by the leather cup, the nested enclosure portion and the columnar portion are converted from a tightly nested state to a spaced-apart state, so that the gas reaches the air outlet from the gap formed in the spaced-apart state.

[0007] Furthermore, when the leather cup is assembled, the boundary flat plate portion is tightly pressed and sealed between the upper cover and the cylinder body.

[0008] Furthermore, the bowl portion includes a bowl upper portion and a bowl lower portion, the elastic diaphragm is provided between the bowl upper portion and the bowl lower portion, the swing frame includes a swing arm, the swing arm is provided with a drum portion, the drum portion is embedded in the bowl lower portion and abuts against the elastic diaphragm.

[0009] Furthermore, an air suction hole is provided on the upper surface of the drum.

[0010] Furthermore, an air inlet cavity connected to the air outlet is provided at the bottom of the upper cover, and the columnar portion is located within the range of the air inlet cavity; when subjected to the impact force of the gas pressurized by the leather cup, the nested enclosure portion and the columnar portion are transformed from a tightly nested state to a spaced-apart state, so that the gas reaches the air inlet cavity from the gap formed in the spaced-apart state, and then is guided to the air outlet by the air inlet cavity.

[0011] Furthermore, a reset spring for resetting the blocking block is also provided in the valve cavity, one end of the reset spring acts on the side wall of the valve cavity, and the other end of the reset spring acts on the blocking block. When the motor is working, the elastic force of the reset spring acting on the blocking block is smaller than the centrifugal force acting on the blocking block. When the motor stops working, the blocking block moves in a direction away from the air guide hole under the action of the elastic force of the reset spring, so as to reset the blocking block.

[0012] Furthermore, the blocking block includes a small cylindrical section and a large cylindrical section arranged coaxially, the length of the small cylindrical section is greater than that of the large cylindrical section, the return spring is sleeved on the small cylindrical section, and one end of the large cylindrical section close to the small cylindrical section constitutes a limit for one end of the return spring.

[0013] Furthermore, an end surface of the small cylindrical section close to one end of the air guide hole is provided with an embedded groove, and a flexible sealing member for sealing the air guide hole is provided in the embedded groove.

[0014] Furthermore, a center hole is provided through the output shaft of the motor, the lower end of the center hole is connected to an external air path, and the upper end of the center hole is connected to the air path of the air inlet.

[0015] The beneficial effects of the utility model compared with the prior art are as follows: a silent pump with automatic exhaust function, comprising a motor and a pump head connected to the motor, the pump head comprising an upper cover and a bottom cover, and a leather cup, a cylinder body and a swing frame arranged between the upper cover and the bottom cover, the upper cover is provided with an air outlet, the bottom cover is provided with an air filling and exhaust port, the cylinder body is arranged below the upper cover, the leather cup is installed on the cylinder body, the upper part of the leather cup is nested and connected with the upper cover, the swing frame is arranged below the cylinder body, the lower part of the leather cup is connected with the swing frame, the cylinder body and the bottom cover define a pump chamber, a rotatable valve body is arranged in the pump chamber, the valve body is eccentrically connected to the swing frame, and the output shaft of the motor extends It extends into the pump chamber and is connected to the valve body. The valve body is provided with a valve chamber. The valve chamber is provided with an air guide hole connected to the pump chamber air path, and an air inlet hole for introducing external gas. A sealing block is movably arranged in the valve chamber. When the motor is working, the sealing block blocks the air guide hole under the action of centrifugal force. At the same time, the motor drives the lower part of the leather cup to move, so that the gas enters from the filling and exhaust port through the pump chamber to reach the leather cup, and is pressurized by the leather cup. After the pressurized gas rushes out from the nested part of the upper part of the leather cup and the upper cover, it is discharged from the air outlet. When the motor stops working, the air guide hole, the air inlet hole, the pump chamber and the filling and exhaust port form an air path. Compared with the prior art that uses an electromagnetic valve to achieve the filling and exhaust function of a vacuum pump, the present application can greatly reduce costs, and the valve body and the sealing block can be made smaller, which can reduce the overall volume. At the same time, the sealing block relies on the action of centrifugal force to achieve the sealing function, and there will be no noise, and there will be no problem of heating of the circuit board after long-term use. In addition, by utilizing the cooperation between the upper part of the leather cup and the nested part of the upper cover, the function of the umbrella in the prior art is replaced, so there is no need to use the umbrella and valve plate, reducing the use of parts, simplifying the structure, and saving costs. At the same time, the pressurized gas rushes out from the nested part of the upper part of the leather cup and the upper cover, that is, the gas discharge is achieved by relying on the contractility of the upper part of the leather bowl. Compared with the exhaust method of the umbrella, the use noise is greatly reduced.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a silent pump with automatic exhaust function provided in a specific embodiment of the utility model;

[0019] Figure 2 An exploded view of a silent pump with automatic exhaust function provided by a specific embodiment of the utility model;

[0020] Figure 3 A cross-sectional view of a silent pump with automatic exhaust function provided by a specific embodiment of the utility model;

[0021] Figure 4 A structural schematic diagram of a leather cup in a silent pump with automatic exhaust function provided by a specific embodiment of the utility model;

[0022] Figure 5 A structural schematic diagram of a leather cup in a silent pump with automatic exhaust function provided by a specific embodiment of the utility model from another perspective;

[0023] Figure 6 A schematic diagram of the structure of an upper cover of a silent pump with an automatic exhaust function provided by a specific embodiment of the utility model;

[0024] Figure 7 A schematic diagram of the partial structure of a valve body in a silent pump with automatic exhaust function provided in a specific embodiment of the utility model.

[0025] Reference numerals

[0026] 1. Motor; 11. Output shaft of motor; 111. Center hole; 2. Pump head; 21. Upper cover; 211. Air outlet; 212. Air inlet cavity; 213. Columnar part; 22. Bottom cover; 221. Inflating and exhausting port; 23. Leather cup; 231. Demarcation plate part; 232. Nesting enclosure part; 233. Bowl part; 2331. Upper part of bowl; 2332. Lower part of bowl; 234. Elastic diaphragm; 2341. Air inlet opening; 24. Cylinder body; 241. Through hole; 25. Swing frame; 251 , swing arm; 2511, drum; 25111, air intake hole; 26, valve body; 261, valve shell; 2611, eccentric hole; 26111, eccentric shaft; 26112, steel ball; 2612, counterweight hole; 26121, counterweight block; 2613, air inlet hole; 262, valve cover; 2621, air guide hole; 263, valve cavity; 2631, inner wall groove; 2632, inner wall protrusion; 27, blocking block; 271, flexible seal; 272, return spring; 28, pump cavity. DETAILED DESCRIPTION

[0027] The following will be combined with the specific embodiments of the utility model to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be understood that when used in this specification and claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terms used in the utility model specification are only for the purpose of describing specific embodiments and are not intended to limit the utility model. As used in the utility model specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0030] It should be further understood that the term “and / or” used in the present specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0031] like Figure 1-Figure 7As shown, an embodiment of the utility model provides a silent pump with automatic exhaust function, including a motor 1, and a pump head 2 connected to the motor 1, the pump head 2 includes an upper cover 21 and a bottom cover 22, and a leather cup 23, a cylinder body 24 and a swing frame 25 arranged between the upper cover 21 and the bottom cover 22, the upper cover 21 is provided with an air outlet 211, and the bottom cover 22 is provided with an inflation and exhaust port 221, and the inflation and exhaust port 221 is used to connect with external products that need to be inflated and / or exhausted. The cylinder body 24 is arranged below the upper cover 21, the leather cup 23 is installed on the cylinder body 24, the upper part of the leather cup 23 is nested and connected with the upper cover 21, the swing frame 25 is arranged below the cylinder body 24, the lower part of the leather cup 23 is connected with the swing frame 25, the cylinder body 24 and the bottom cover 22 define a pump chamber 28, a rotatable valve body 26 is provided in the pump chamber 28, the valve body 26 is eccentrically connected to the swing frame 25, the motor 1 is sealed and connected to the bottom of the bottom cover 22, and the output shaft 11 of the motor extends toward the bottom cover 22. In order to improve the sealing performance, a sealing ring is generally provided at the connection between the motor 1 and the bottom cover 22. The output shaft 11 of the motor extends into the pump chamber 28 and is connected to the valve body 26. The valve body 26 is provided with a valve chamber 263. The valve chamber 263 is provided with an air guide hole 2621 connected to the air path of the pump chamber 28, and an air inlet hole 2613 for introducing external gas. A blocking block 27 is movably provided in the valve chamber 263. When the motor 1 is working, the output shaft 11 of the motor will drive the valve body 26 to rotate, and the blocking block 27 is provided in the valve chamber 263. 7 blocks the air guide hole 2621 under the action of centrifugal force. At the same time, the motor 1 drives the lower part of the leather cup 23 to move, so that the gas enters from the filling and exhaust port 221 through the pump chamber 28 to reach the leather cup 23, and is pressurized by the leather cup 23. The pressurized gas rushes out from the nesting position between the upper part of the leather cup 23 and the upper cover 21, and is discharged from the air outlet 211. When the motor 1 stops working, the air guide hole 2621, the air inlet hole 2613, the pump chamber 28 and the filling and exhaust port 221 form an air path.

[0032] By means of the blocking block 27 movably arranged in the valve cavity 263, when the motor 1 is working, the output shaft 11 of the motor will drive the valve body 26 to rotate, and the blocking block 27 of the valve body 26 will be affected by the centrifugal force, thereby blocking the air guide hole 2621. At this time, the external airflow cannot enter the pump cavity 28 from the air guide hole 2621, but the air outlet 211, the pump cavity 28 and the inflation and exhaust port 221 form an air path to achieve the exhaust function. When the motor 1 stops working, the air outlet 211, the pump cavity 28 and the inflation and exhaust port 221 form an air circuit break, but because the blocking block 27 is not affected by the centrifugal force, the air guide hole 2621 will not be blocked. At this time, the external airflow can enter the pump cavity 28 from the air inlet 2613, so that the air inlet 2613, the pump cavity 28 and the inflation and exhaust port 221 form an air path to achieve the inflation function. Compared with using a solenoid valve to realize the filling and exhausting function of a vacuum pump, the present application can greatly reduce costs, and the valve body 26 and the blocking block 27 can be made smaller, which can reduce the overall volume. At the same time, the blocking block 27 realizes the blocking function by the action of centrifugal force, and there will be no noise, and there will be no problem of heating of the circuit board of the vacuum pump after long-term use. In addition, by utilizing the cooperation between the upper part of the leather cup 23 and the nested part of the upper cover 21, the function of the umbrella in the prior art is replaced, so that there is no need to use the umbrella and valve plate, the use of parts is reduced, the structure is simplified, and the cost is saved. At the same time, the pressurized gas rushes out from the nested part of the upper part of the leather cup 23 and the upper cover 21, that is, the gas is discharged by relying on the contractility of the upper part of the leather cup 23. Compared with the exhaust method of the umbrella, the use noise is greatly reduced.

[0033] Furthermore, if Figure 4-Figure 6As shown, the leather cup 23 is an elastic component, and the leather cup 23 includes a dividing flat plate portion 231, a nested enclosure portion 232 extending upward along the upper surface of the dividing flat plate portion 231, and a bowl portion 233 extending downward along the lower surface of the dividing flat plate portion 231. The positions of the nested enclosure portion 232 and the bowl portion 233 correspond to each other. In this embodiment, the number of the nested enclosure portions 232 is three, and the number of the bowl portions 233 is also three, and each nested enclosure portion 232 is arranged opposite to each bowl portion 233 up and down. The bowl portion 233 is provided with an elastic diaphragm 234, and the elastic diaphragm 234 is provided with an air intake opening 2341. When the air intake opening 2341 is opened, the nested enclosure portion 232 is communicated with the bowl portion 233, and the bowl portion 233 is connected to the swing frame 25. The bottom of the upper cover 21 is provided with a columnar portion 213 which is nested and connected with the nested enclosure portion 232. When subjected to the impact force of the gas pressurized by the leather cup 23, the nested enclosure portion 232 and the columnar portion 213 are converted from a tightly nested state to a spaced-apart state, so that the gas reaches the air outlet 211 from the gap formed in the spaced-apart state. When the nested enclosure portion 232 is not subjected to the impact force of the gas, since the nested enclosure portion 232 has a certain degree of contractility, the inner side wall of the nested enclosure portion 232 will form a tight nested fit with the outer side surface of the columnar portion 213.

[0034] Specifically, the nested enclosure portion 232 is a cylindrical structure with an opening at the top, and the columnar portion 213 is a solid cylindrical shape. This design is more conducive to the gas rushing out from the nested position of the nested enclosure portion 232 and the columnar portion 213, and is also conducive to the nested enclosure portion 232 and the columnar portion 213 forming a tight nest.

[0035] Furthermore, when the leather bowl 23 is assembled, the boundary flat plate portion 231 is tightly pressed and sealed between the upper cover 21 and the cylinder body 24. The purpose of this design is, firstly, to ensure air tightness and prevent gas from leaking out from the joint between the upper cover 21 and the boundary flat plate portion 231, and secondly, if the boundary flat plate portion 231 is in a loose state, it will cause the swing frame 25 to drive the bowl portion 233 to move, affecting the nested enclosure portion 232 on the upper surface of the boundary flat plate portion 231. Therefore, pressing and fixing the boundary flat plate portion 231 can prevent the swing frame 25 from driving the bowl portion 233 to move and affecting the nested enclosure portion 232. In this embodiment, the upper cover 21 and the bottom cover 22 are locked by long screws. After locking, the boundary flat plate portion 231 is pressed and sealed between the upper cover 21 and the cylinder body 24 under the action of the upper cover 21 and the cylinder body 24.

[0036] Furthermore, if Figure 2-Figure 5As shown, the bowl portion 233 includes a bowl upper portion 2331 and a bowl lower portion 2332, an elastic diaphragm 234 is provided between the bowl upper portion 2331 and the bowl lower portion 2332, and the swing frame 25 includes a swing arm 251, and the swing arm 251 is provided with a drum portion 2511, and the drum portion 2511 is embedded in the bowl lower portion 2332 and abuts against the elastic diaphragm 234. The upper surface of the drum portion 2511 is provided with an air suction hole 25111, and the air suction opening 2341 is a semi-separated opening, one end of the air suction opening 2341 is connected to the elastic diaphragm 234, the size of the air suction opening 2341 is smaller than the size of the upper surface of the drum portion 2511, and the size of the air suction opening 2341 is larger than the size of the air suction hole 25111, and such a structure enables the air suction opening 2341 to be opened only in one direction.

[0037] The drum portion 25112 is a hollow cylindrical structure, and the inner diameter of the bowl lower portion 2332 is smaller than the outer diameter of the drum portion 2511. Since the leather cup 23 is an elastic component, the drum portion 25112 can be inserted into the bowl lower portion 2332 of the leather cup 23 even if the inner diameter of the bowl lower portion 2332 is smaller than the outer diameter of the drum portion 2511.

[0038] In this embodiment, the inner diameter of the nested enclosure portion 232 is the same as the inner diameter of the bowl upper portion 2331, and the boundary flat plate portion 231 is provided with an avoidance hole corresponding to the position of the nested enclosure portion 232 and the bowl upper portion 2331, and the avoidance hole connects the nested enclosure portion 232 and the bowl upper portion 2331.

[0039] Furthermore, if Figure 4-Figure 6 As shown, the bottom of the upper cover 21 is provided with an air inlet cavity 212 connected with the air outlet 211, and the cylindrical portion 213 is located within the range of the air inlet cavity 212; when subjected to the impact force of the gas pressurized by the leather cup 23, the nested enclosure portion 232 and the cylindrical portion 213 are transformed from a tightly nested state to a spaced-apart state, so that the gas reaches the air inlet cavity 212 from the gap formed in the spaced-apart state, and then is guided from the air inlet cavity 212 to the air outlet 211.

[0040] In this embodiment, the air outlet 211 is located at the center of the upper cover 21 and is arranged to penetrate the upper cover 21 vertically.

[0041] Furthermore, if Figure 2 As shown, the cylinder body 24 is provided with a through hole 241 running through the upper and lower parts, the bowl portion 233 is placed in the through hole 241 and connected to the swing frame 25, and a central connecting hole connected to the valve body 26 is provided at the bottom center of the swing frame 25. The swing frame 25 is eccentrically connected to the valve body 26 through an eccentric shaft 26111 via its central connecting hole.

[0042] Furthermore, a return spring 272 for resetting the blocking block 27 is also provided in the valve cavity 263. One end of the return spring 272 acts on the side wall of the valve cavity 263, and the other end of the return spring 272 acts on the blocking block 27. When the motor 1 is working, the elastic force of the return spring 272 on the blocking block 27 is less than the centrifugal force. When the motor 1 stops working, the blocking block 27 moves away from the air guide hole 2621 under the elastic force of the return spring 272 to reset the blocking block 27. The purpose of setting the return spring 272 is to enable the blocking block 27 to automatically reset when the motor 1 is switched from the working state to the stopped state, so as to avoid affecting the entry of external gas.

[0043] In order to facilitate the movement of the blocking block 27 in the valve chamber 263, the shape of the blocking block 27 can be spherical, square or cylindrical. The material of the blocking block 27 can be iron, stainless steel and other materials. In the present embodiment, the blocking block 27 includes a small cylindrical section and a large cylindrical section arranged coaxially, and the small cylindrical section and the large cylindrical section are an integrated structure. The small cylindrical section is arranged near the air guide hole 2621, and the large cylindrical section is arranged near the air inlet 2613. The length of the small cylindrical section is greater than that of the large cylindrical section. The reset spring 272 is sleeved on the small cylindrical section, and one end of the large cylindrical section close to the small cylindrical section constitutes a limit to one end of the reset spring 272. The blocking block 27 is designed in this way, which is not only convenient for its movement, but also convenient for the reset spring 272 to apply force to it.

[0044] An embedded groove is provided on the end surface of one end of the small cylindrical section close to the air guide hole 2621, and a flexible seal 271 for blocking the air guide hole 2621 is provided in the embedded groove. The flexible seal 271 can be more closely attached to the side wall provided with the air guide hole 2621 when the blocking block 27 is subjected to the centrifugal force, thereby improving the blocking performance. Preferably, the flexible seal 271 is made of silicone material, which has the advantage of having a certain hardness but also a certain flexibility, and can be directly fixed in the embedded groove by an adhesive, which is convenient for installation and use.

[0045] like Figure 1-Figure 3 , Figure 7 As shown, the inner wall of the valve cavity 263 is provided with a plurality of inner wall grooves 2631 along the direction of movement of the blocking block 27. The purpose of the arrangement is to provide storage space for the gas in the valve cavity 263 when the blocking block 27 moves, thereby reducing the resistance to the sliding of the blocking block 27. Furthermore, the inner wall of the valve cavity 263 provided with the air inlet 2613 is also provided with a plurality of inner wall protrusions 2632, which have a similar function to the inner wall grooves 2631, and the combination of the two makes the movement of the blocking block 27 smoother.

[0046] like Figure 1-Figure 3As shown, the valve cavity 263 is arranged eccentrically relative to the center of the valve body 26. The purpose of such arrangement is that since the valve block itself is small in volume, such a design can make the blocking block more susceptible to the centrifugal force, so as to facilitate the blocking of the air guide hole 2621.

[0047] Optionally, a counterweight 26121 is provided on the valve body 26. The counterweight 26121 is located in another area of ​​the valve body 26 opposite to the valve cavity 263. Since the valve cavity 263 is eccentrically arranged and the output shaft 11 of the motor is connected to the center of the bottom of the valve body 26, the counterweight 26121 can not only balance the center of gravity of the valve body 26, but also reduce the noise generated when the valve body 26 rotates.

[0048] like Figure 1-Figure 3 As shown, in the present embodiment, in order to facilitate the assembly of the blocking block 27, the return spring 272 and the flexible sealing member 271, the valve body 26 includes a valve housing 261 and a valve cover 262 which is snap-connected to the valve housing 261. The valve cover 262 is located at one side of the valve housing 261. The valve cover 262 and the valve housing 261 jointly define a valve chamber 263. The valve cover 262 is provided with an air guide hole 2621. The valve housing 261 is provided with an air inlet. An eccentric hole 2611 and a counterweight hole 2612 are further provided on the upper surface of the valve housing 261, wherein the counterweight hole 2612 is used to install a counterweight block 26121. The eccentric hole 2611 is inclinedly arranged. A steel ball 26112 is arranged in the eccentric hole 2611. The lower end of the eccentric shaft 26111 is inserted into the eccentric hole 2611 and is slidably connected to the steel ball 26112. The upper end of the eccentric shaft 26111 is connected to the central connecting hole of the swing frame 25.

[0049] like Figure 3 As shown, the output shaft 11 of the motor is provided with a center hole 111, the lower end of the center hole 111 is connected to the external gas path, and the upper end of the center hole 111 is connected to the gas path of the air inlet 2613. In this embodiment, by opening the center hole 111 on the output shaft 11 of the motor, the external gas is introduced into the position of the air inlet 2613 by using the center hole 111, and the introduction of the external gas is achieved by using a simple structure. Compared with setting a structure for introducing gas on the bottom cover 22 or other parts, this design method is more ingenious.

[0050] The working principle is as follows: when the motor 1 is working, the motor 1 is energized to drive the output shaft 11 of the motor to rotate, and the valve body 26 rotates synchronously. The valve body 26 drives the eccentric shaft 26111 to move, so that the swing frame 25 swings to drive the elastic diaphragm 234 of the leather cup 23 to move up and down. The gas enters from the filling and exhaust port 221 and is pressurized upward through the leather cup 23. When subjected to the impact force of the pressurized gas of the leather cup 23, the nested enclosure portion 232 of the leather cup 23 and the columnar portion 213 of the upper cover 21 are converted from a tightly nested state to a spaced-apart state, so that the gas reaches the air inlet chamber 212 through the gap formed in the spaced-apart state, and is then guided from the air inlet chamber 212 to the air outlet 211, thereby realizing the exhaust function. When the motor 1 stops working, the nested enclosure portion 232 will not be affected by the impact force of the gas, and the inner wall of the nested enclosure portion 232 will form a tight nested fit with the outer side surface of the cylindrical portion 213, forming an air circuit break among the air outlet 211, the pump chamber 28 and the inflation / exhaust port 221. However, since the blocking block 27 is not affected by the centrifugal force, the air guide hole 2621 will not be blocked. At this time, the external airflow can enter the pump chamber 28 from the air inlet hole 2613, so that the air inlet hole 2613, the pump chamber 28 and the inflation / exhaust port 221 form an air path to realize the inflation function.

[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A silent pump with automatic exhaust function, characterized in that: It includes a motor and a pump head connected to the motor, the pump head includes an upper cover and a bottom cover, and a leather cup, a cylinder body and a swing frame arranged between the upper cover and the bottom cover, the upper cover is provided with an air outlet, the bottom cover is provided with an air filling and exhaust port, the cylinder body is arranged below the upper cover, the leather cup is installed on the cylinder body, the upper part of the leather cup is nested and connected with the upper cover, the swing frame is arranged below the cylinder body, the lower part of the leather cup is connected with the swing frame, the cylinder body and the bottom cover define a pump chamber, a rotatable valve body is arranged in the pump chamber, and the valve body is eccentric to the swing frame The motor is connected, the output shaft of the motor extends into the pump chamber and is connected to the valve body, the valve body is provided with a valve chamber, the valve chamber is provided with an air guide hole connected to the pump chamber air path, and an air inlet hole for introducing external gas, a blocking block is movably provided in the valve chamber, when the motor is working, the blocking block blocks the air guide hole under the action of centrifugal force, and at the same time, the motor drives the lower part of the leather cup to move, so that the gas enters from the filling and exhaust port through the pump chamber to reach the leather cup, and is pressurized by the leather cup, and the pressurized gas is discharged from the upper part of the leather cup and the upper cover After the nested part is rushed out, it is discharged from the air outlet. When the motor stops working, the air guide hole, the air inlet, the pump chamber and the inflation and exhaust port form an air path; the leather cup is an elastic component, and the leather cup includes a dividing flat plate portion, a nested enclosure portion extending upward along the upper surface of the dividing flat plate portion, and a bowl portion extending downward along the lower surface of the dividing flat plate portion. The nested enclosure portion corresponds to the position of the bowl portion. The bowl portion is provided with an elastic diaphragm, and the elastic diaphragm is provided with an air intake opening. When the air intake opening is opened, the nested enclosure portion and the bowl portion The bowl portion is connected to the swing frame, and the bottom of the upper cover is provided with a columnar portion which is nested and connected with the nested enclosure portion; when subjected to the impact force of the gas pressurized by the leather cup, the nested enclosure portion and the columnar portion are converted from a tightly nested state to a spaced-apart state, so that the gas can reach the air outlet from the gap formed in the spaced-apart state; the bowl portion includes an upper bowl portion and a lower bowl portion, and the elastic diaphragm is provided between the upper bowl portion and the lower bowl portion, and the swing frame includes a swing arm, and the swing arm is provided with a drum portion, and the drum portion is embedded in the lower bowl portion and abuts against the elastic diaphragm.

2. A silent pump with automatic exhaust function according to claim 1, characterized in that: When the leather cup is assembled, the boundary flat plate portion is tightly pressed and sealed between the upper cover and the cylinder body.

3. A silent pump with automatic exhaust function according to claim 1, characterized in that: The upper surface of the drum is provided with an air suction hole.

4. A silent pump with automatic exhaust function according to claim 1, characterized in that: An air inlet cavity connected to the air outlet is provided at the bottom of the upper cover, and the columnar portion is located within the range of the air inlet cavity; when subjected to the impact force of the gas pressurized by the leather cup, the nested enclosure portion and the columnar portion are transformed from a tightly nested state to a spaced-apart state, so that the gas reaches the air inlet cavity from the gap formed in the spaced-apart state, and then is guided to the air outlet by the air inlet cavity.

5. A silent pump with automatic exhaust function according to claim 1, characterized in that: The valve cavity is also provided with a reset spring for resetting the blocking block, one end of the reset spring acts on the side wall of the valve cavity, and the other end of the reset spring acts on the blocking block. When the motor is working, the elastic force of the reset spring on the blocking block is less than the centrifugal force it is subjected to. When the motor stops working, the blocking block moves in a direction away from the air guide hole under the action of the elastic force of the reset spring to reset the blocking block.

6. A silent pump with automatic exhaust function according to claim 5, characterized in that: The blocking block includes a small cylindrical section and a large cylindrical section arranged coaxially, the length of the small cylindrical section is greater than that of the large cylindrical section, the return spring is sleeved on the small cylindrical section, and one end of the large cylindrical section close to the small cylindrical section constitutes a limit for one end of the return spring.

7. A silent pump with automatic exhaust function according to claim 6, characterized in that: An end surface of the small cylindrical section close to one end of the air guide hole is provided with an embedded groove, and a flexible sealing member for sealing the air guide hole is provided in the embedded groove.

8. A silent pump with automatic exhaust function according to claim 1, characterized in that: The output shaft of the motor is penetrated by a center hole, the lower end of the center hole is connected to an external air path, and the upper end of the center hole is connected to the air path of the air inlet.

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