Air pump

Abstract

The utility model discloses an air pump which comprises a motor, a shell, an eccentric wheel, a support, an upper cover and a leather cup, a partition plate is provided with an installation hole and a plurality of air inlet holes, a first sealing piece is installed in the installation hole and comprises a first sealing gasket, the first sealing gasket is arranged at the end of a connecting rod, and a second sealing gasket is arranged at the end of the connecting rod. The first sealing gasket is located at the first end of the partition plate and matched with the air inlet in a sealing mode, a first protruding part matched with the air inlet is arranged on the first sealing gasket, a plurality of exhaust holes are formed in the partition plate, a second sealing gasket is installed at the second end of the partition plate, and the exhaust holes are matched with the second sealing gasket. The sealing structure has the following beneficial effects that the effect of positioning and installing the first sealing gasket is achieved through cooperation of the first protruding parts and the air inlet holes, the sealing performance can be further improved through cooperation between the first protruding parts and the air inlet holes, the multiple air inlet holes correspond to one leather cup, and therefore the air inlet amount during air inlet can be increased.

Description

Technical Field

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

[0002] A micro air pump is a gas delivery device with a small size and a gaseous working medium. It is mainly used for gas sampling, gas circulation, vacuum adsorption, vacuum pressure maintenance, exhaust, inflation, pressurization and other purposes. Micro air pumps are divided into: micro negative pressure pumps, micro vacuum pumps, micro gas circulation pumps, micro air pumps, micro gas sampling pumps, micro air pumps, micro air pumps, micro air pumps, micro air pumps, etc. According to the working principle, there are diaphragm type, electromagnetic type, impeller type, piston type, etc. The micro air pumps that are widely used in general medical and health, scientific research, laboratories, environmental protection, instrumentation, chemical industry and other industries mainly refer to micro vacuum pumps.

[0003] After searching, a Chinese invention patent (application publication number: CN115095508A) is a miniature DC diaphragm air pump, which includes a motor, an eccentric wheel, a steel shaft, a swing frame, an air bag, an air chamber, a valve seat and an upper cover, and also includes an integrated inlet and outlet valve plate, wherein the center hole of the eccentric wheel is connected to the rotating shaft of the motor, one end of the steel shaft is inserted into the inclined hole of the eccentric wheel, and the other end is connected to the swing frame, the air bag is installed in the air chamber and connected to the swing frame; the air chamber is connected to the valve seat; the inlet and outlet valve plate is arranged between the valve seat and the upper cover, and includes an inlet valve plate and an outlet valve plate, which is used to connect the inlet and outlet ports of the upper cover with the air bag.

[0004] The above-mentioned defect of the existing technology is that the inlet and outlet valve plates include an inlet valve plate and an outlet valve plate, and each inlet valve plate and outlet valve plate corresponds to an air bag. Due to the poor sealing performance of the inlet valve plate, air leakage will occur during use, and there is only a gap at the edge of the inlet valve plate for air intake, resulting in a small amount of air intake. Therefore, the above-mentioned shortcomings need to be improved urgently. Utility Model Content

[0005] The purpose of the present invention is to solve the above problems. The present invention provides an air pump with the advantages of stronger sealing and larger air intake.

[0006] To achieve the above object, the present utility model provides the following technical solutions: It includes a motor, a housing, an eccentric wheel, a bracket, an upper cover and a leather cup. The motor is fixed at the lower end of the housing and its drive shaft extends into the housing. The eccentric wheel and the bracket are connected by a swing rod and arranged in the housing. The lower part of the eccentric wheel is fixed to the drive shaft. A leather cup seat is arranged in the housing. A through hole is provided on the upper end surface of the leather cup seat. The leather cup passes through the through hole and is sleeved on the upper end surface of the leather cup seat. The lower part of the leather cup is sleeved on the bracket. A partition plate and an upper cover are sequentially fixed on the housing. The partition plate has a first end and a second end. The first end of the partition plate is connected and matched with the leather cup. The second end of the partition plate is connected and matched with the upper cover. An installation hole and a plurality of air inlet holes are provided on the partition plate. A first sealing member is installed in the installation hole. The first sealing member includes a first sealing pad, a connecting rod and a flange. The first sealing pad is arranged at the end of the connecting rod. The flange is arranged on the outer circumference of the connecting rod. The connecting rod is inserted into the installation hole. The first sealing pad is located at the first end of the partition plate and is in sealing cooperation with the air inlet hole. A first protrusion portion matching with the air inlet hole is provided on the first sealing pad. A plurality of exhaust holes are provided on the partition plate. A second sealing pad is installed at the second end of the partition plate. The exhaust holes are in cooperation with the second sealing pad.

[0007] Preferably, the air inlet holes are arranged circumferentially along the installation hole.

[0008] Preferably, the first end of the partition plate has a fitting cavity matching with the first sealing pad, and the first sealing pad is arranged in the fitting cavity.

[0009] Preferably, an installation cavity is provided at the second end of the partition plate, a guide rod is arranged in the installation cavity, and a connection hole matching with the guide rod is provided on the second sealing pad.

[0010] Preferably, a second protrusion portion matching with the exhaust holes is provided on the second sealing pad.

[0011] Preferably, a cross seat is provided on the second sealing pad.

[0012] Preferably, the housing, the leather cup seat, the partition plate and the upper cover are fixedly connected by a clamp.

[0013] Preferably, bowl-shaped cavities are provided on both the first protrusion portion and the second protrusion portion.

[0014] Preferably, the flange is a sphere with a diameter larger than the installation hole.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] An air pump provided by the present utility model realizes the function of positioning and installing a first gasket through the cooperation of a first convex portion with an air inlet hole, and the cooperation between the first convex portion and the air inlet hole can further improve the sealing performance. Moreover, a plurality of air inlet holes are arranged corresponding to one leather cup, thereby improving the air intake volume during air intake. Description of the Drawings

[0017] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 is a cross-sectional structural schematic diagram of the present utility model;

[0019] Figure 3 is Figure 2 an enlarged structural schematic diagram of A in

[0020] Figure 4 is Figure 2 an enlarged structural schematic diagram of B in

[0021] Figure 5 is a partial three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 6 is a partial three-dimensional structural schematic diagram of the present utility model;

[0023] Figure 7 is a three-dimensional structural schematic diagram of the first seal of the present utility model;

[0024] Figure 8 is a three-dimensional structural schematic diagram of the second gasket of the present utility model.

[0025] Description of the Drawings: 11. Motor; 111. Eccentric wheel; 12. Housing; 13. Leather cup seat; 14. Partition board; 140. Mounting hole; 141. Matching cavity; 142. Air inlet hole; 143. Exhaust hole; 144. Mounting cavity; 145. Guide rod; 15. Upper cover; 16. Clamp; 20. Leather cup; 201. Inner cavity of leather cup; 21. Bracket; 22. Swing rod; 31. First seal; 311. First gasket; 312. First convex portion; 313. Connecting rod; 314. Flange; 32. Second gasket; 321. Second convex portion; 322. Cross seat; 323. Connecting hole; 4. Bowl-shaped cavity. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] As Figures 1-8 shown, an air pump includes a motor 11, a housing 12, an eccentric wheel 111, a bracket 21, an upper cover 15, and a leather cup 20. The motor 11 is fixed at the lower end of the housing 12 and its drive shaft extends into the housing 12. The eccentric wheel 111 and the bracket 21 are connected by a swing rod 22 and disposed in the housing 12. The lower part of the eccentric wheel 111 is fixed to the drive shaft. A leather cup seat 13 is provided in the housing 12. A through hole is provided on the upper end surface of the leather cup seat 13. The leather cup 20 passes through the through hole and is sleeved on the upper end surface of the leather cup seat 13. The lower part of the leather cup 20 is sleeved on the bracket 21. A partition 14 and an upper cover 15 are sequentially fixed on the housing 12. The partition 14 has a first end and a second end. The first end of the partition 14 is cooperatively connected with the leather cup 20. The second end of the partition 14 is cooperatively connected with the upper cover 15. An installation hole 140 and a plurality of air inlet holes 142 are provided on the partition 14. The air inlet holes 142 are arranged circumferentially along the installation hole 140. A first seal 31 is installed in the installation hole 140. The first seal 31 includes a first gasket 311, a connecting rod 313, and a flange 314. The first gasket 311 is disposed at the end of the connecting rod 313. The flange 314 is disposed on the outer periphery of the connecting rod 313. The connecting rod 313 is inserted into the installation hole 140. The first gasket 311 is located at the first end of the partition 14 and is in sealing cooperation with the air inlet holes 142. A first protrusion 312 cooperating with the air inlet holes 142 is provided on the first gasket 311. An installation cavity 144 is provided at the second end of the partition 14. A plurality of exhaust holes 143 are provided in the installation cavity 144. A second gasket 32 is installed in the installation cavity 144. The exhaust holes 143 are in cooperation with the second gasket 32.

[0028] As Figures 5-6 shown, the flange 314 is a sphere with a diameter larger than the installation hole 140. The flange 314 is an elastic member, so that the flange 314 can be installed through the installation hole 140, and the flange 314 functions as a limit.

[0029] It should be noted that: the first protrusion 312 realizes the positioning and installation of the first gasket 311 by cooperating with the air inlet holes 142, and the sealing performance can be further improved through the cooperation between the first protrusion 312 and the air inlet holes 142.

[0030] In this application, the number of the leather cups 20 is four, and the four leather cups 20 are arranged in a 2X2 pattern on the leather cup seat 13. Additionally, the four leather cups 20 are integrally formed. Therefore, the number of the mounting holes 140 and the exhaust holes 143 is also four. Each mounting hole 140 penetrates through to the inner cavity 201 of the leather cup, and four air inlet holes 142 are provided around each mounting hole 140. Moreover, the number of the air inlet holes 142 can be any other number except four. By providing multiple air inlet holes 142, the air intake volume can be increased.

[0031] As Figure 2 shown, the leather cup 20 in this application is a bell-shaped airbag.

[0032] During specific use, the motor 11 starts to drive the eccentric wheel 111 to rotate. Then, the swing rod 22 drives the bracket 21 to swing, so that the bell-shaped airbag makes a reciprocating motion in the up and down direction, and the gas in the inner cavity 201 of the leather cup forms a positive and negative pressure cyclic change. When the leather cup 20 moves towards the side close to the motor 11, the inner cavity 201 of the leather cup 20 is in a negative pressure state. A pressure difference is generated between the air inlet hole 142 of the leather cup 20 and the external atmospheric pressure. Under the action of the pressure difference, the first gasket 311 is disengaged from the air inlet hole 142, opening the air inlet hole 142, and enabling the gas to be sucked into the leather cup 20 from the air inlet pipe. When the leather cup 20 moves towards the side away from the motor 11, the gas pressure increases. When the gas pressure increases to a certain value, the second gasket 32 is opened and discharged from the exhaust hole 143. When the motor 11 drives the eccentric wheel 111 to rotate one week, the four leather cups 20 can respectively achieve a reciprocating motion once, thus realizing four processes of air intake and exhaust, and the output flow rate is large.

[0033] As Figure 3 shown, the first end of the partition plate 14 has a fitting cavity 141 that fits with the first gasket 311, and the first gasket 311 is arranged in the fitting cavity 141.

[0034] As Figure 5 shown, the guide rod 145 is provided in the mounting cavity 144. The second gasket 32 has a connection hole 323 that fits with the guide rod 145. The second gasket 32 is provided with a second protrusion 321 that fits with the exhaust hole 143. The second protrusion 321 realizes the positioning and installation of the second gasket 32 by fitting with the exhaust hole 143, and the sealing performance can be further improved through the cooperation between the second protrusion 321 and the exhaust hole 143.

[0035] As Figure 6As shown, a cross-shaped seat 322 is integrally formed on the second gasket 32. The second gasket 32 is divided into four regions by the cross-shaped seat 322, and each region corresponds to each exhaust hole 143 respectively. Thus, when the exhaust hole 143 exhausts, only the gasket in the corresponding region can be blown up, which may cause the air in the inner cavity 201 of the leather cup that does not need to exhaust to leak.

[0036] Furthermore, bowl-shaped cavities 4 are provided on both the first convex portion 312 and the second convex portion 321, so that the force-bearing area can be increased, and the gasket can be more easily lifted when exhausting or admitting air.

[0037] As Figure 2 shown, the housing 12, the leather cup seat 13, the partition plate 14 and the upper cover 15 are fixedly connected by a clamp 16.

[0038] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air pump, comprising a motor (11), a housing (12), an eccentric wheel (111), a bracket (21), an upper cover (15) and a leather cup (20). The motor (11) is fixed at the lower end of the housing (12) and its drive shaft extends into the housing (12). The eccentric wheel (111) and the bracket (21) are connected by a swing rod (22) and arranged in the housing (12). The lower part of the eccentric wheel (111) is fixed to the drive shaft. A leather cup seat (13) is arranged in the housing (12). A through hole is provided on the upper end surface of the leather cup seat (13). The leather cup (20) passes through the through hole and is sleeved on the upper end surface of the leather cup seat (13). The lower part of the leather cup (20) is sleeved on the bracket (21). A partition plate (14) and an upper cover (15) are sequentially fixed on the housing (12), and it is characterized in that: The partition plate (14) has a first end and a second end. The first end of the partition plate (14) is cooperatively connected with the leather cup (20), and the second end of the partition plate (14) is cooperatively connected with the upper cover (15). The partition plate (14) is provided with a mounting hole (140) and a plurality of air inlet holes (142). A first seal (31) is installed in the mounting hole (140). The first seal (31) includes a first gasket (311), a connecting rod (313), and a flange (314). The first gasket (311) is disposed at the end of the connecting rod (313), and the flange (314) is disposed on the outer periphery of the connecting rod (313). The connecting rod (313) is inserted into the mounting hole (140). The first gasket (311) is located at the first end of the partition plate (14) and is in sealing cooperation with the air inlet holes (142). The first gasket (311) is provided with a first protruding portion (312) that cooperates with the air inlet holes (142). The partition plate (14) is provided with a plurality of exhaust holes (143). A second gasket (32) is installed at the second end of the partition plate (14). The exhaust holes (143) cooperate with the second gasket (32).

2. The air pump according to claim 1, characterized in that: The air inlet holes (142) are arranged along the circumferential direction of the mounting hole (140).

3. The air pump according to claim 1, wherein: The first end of the partition plate (14) has a mating cavity (141) that mates with the first gasket (311), and the first gasket (311) is disposed in the mating cavity (141).

4. The air pump according to claim 1, wherein: An installation cavity (144) is provided at the second end of the partition plate (14). A guide rod (145) is provided in the installation cavity (144). The second gasket (32) has a connection hole (323) that mates with the guide rod (145).

5. The air pump according to claim 4, characterized in that: The second gasket (32) is provided with a second protruding portion (321) that cooperates with the exhaust holes (143).

6. The air pump according to claim 5, characterized in that: The second gasket (32) is provided with a cross seat (322).

7. The air pump according to claim 1, characterized in that: The housing (12), the leather cup seat (13), the partition plate (14), and the upper cover (15) are fixedly connected by a clamp (16).

8. The air pump according to claim 5, characterized in that: Both the first protruding portion (312) and the second protruding portion (321) are provided with bowl-shaped cavities (4).

9. The air pump according to claim 1, wherein: The flange (314) is a sphere with a diameter larger than the mounting hole (140).

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