Motor for air pump and air pump having the same

Abstract

The present invention discloses a motor for an air pump and an air pump having the same. The motor for an air pump includes a motor body, and the motor body includes: a motor barrel, a motor shaft, and the motor shaft is vertically arranged in the motor barrel; a rotor, and the rotor is sleeved on the motor shaft; a stator, and the stator is fixed on the inner barrel wall of the motor barrel and sleeved on the outside of the rotor; a commutator, and the commutator is sleeved on the bottom of the motor shaft and electrically connected to the rotor; an insulating plate, and the insulating plate is fixedly mounted on the bottom end of the motor barrel and sleeved on the outside of the commutator, and a carbon brush is arranged on the insulating plate, and the carbon brush contacts the contact piece on the commutator; a rectifier, and the rectifier is arranged on the insulating plate and electrically connected to the carbon brush; and a power cable electrically connected to the rectifier. By arranging a rectifier, an AC power supply is converted into a DC power supply, the voltage of the power supply is increased, and the working current of the motor is reduced, thereby reducing the heat generated by the motor, extending the service life of the motor, and improving the stability of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of air pump motors, and more particularly to an air pump motor and an air pump having the same. Background Art

[0002] Most of the existing air pump motors are directly powered by a DC power supply, but the DC power supply can only be powered by a low power supply, which will cause the motor to have a large current when outputting the same power, causing the motor to heat up, shortening the service life of the motor, and damaging the product structure around the motor, causing the plastic product shell to soften and deform; and the existing air pump generally uses an eccentric wheel connected to the motor shaft to drive the piston connecting rod to move back and forth to achieve gas compression and exhaust, but because the center of gravity of the eccentric wheel and the motor shaft are often not on the same straight line, the eccentric wheel will cause the piston connecting rod to generate a certain centrifugal force during the high-speed operation of the motor shaft, causing greater vibration and noise when the motor is running; and the piston connecting rod reciprocates to compress the air and do work, resulting in a higher heat generation of the air pump, and the existing air pump has no heat dissipation structure, resulting in poor heat dissipation effect of the air pump, which reduces the service life of the air pump.

[0003] Therefore, how to provide an air pump motor and an air pump having the same that can be powered by an AC power supply, reduce the current of the motor, reduce the heat generated by the motor, and have good high voltage resistance, reduced noise, and a compact and stable structure is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] In view of this, the present invention provides an air pump motor and an air pump having the same which can be powered by an AC power supply, reduce the current of the motor, reduce the heat generated by the motor, and has good high voltage resistance, reduced noise, and a compact and stable structure.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A motor for an air pump comprises a motor body, wherein the motor body comprises:

[0007] Motor cylinder,

[0008] A motor shaft, wherein the motor shaft is coaxially arranged inside the motor barrel, one end of the motor shaft is rotatably connected to the bottom end of the motor barrel, and the other end is rotatably connected to the top end of the motor barrel and extends upward through the top end of the motor barrel;

[0009] A rotor, wherein the rotor is sleeved on the motor shaft;

[0010] A stator, the stator being fixed on the inner wall of the motor cylinder and sleeved on the outside of the rotor;

[0011] A commutator, the commutator is sleeved on the bottom of the motor shaft and is electrically connected to the rotor;

[0012] An insulating plate, the insulating plate is fixedly mounted on the bottom end of the motor cylinder and sleeved on the outside of the commutator, a carbon brush is arranged on the insulating plate, and the carbon brush contacts the contact piece on the commutator;

[0013] a rectifier, the rectifier being disposed on the insulating plate and electrically connected to the carbon brush;

[0014] A power cable, one end of which is electrically connected to the rectifier, and the other end of which passes through the bottom end of the motor cylinder and extends downward to be electrically connected to an external AC power source.

[0015] It can be seen from the above technical solution that, compared with the prior art, the present invention discloses a motor for an air pump, which converts high-voltage AC power into a DC power supply for use by setting a rectifier, thereby increasing the voltage of the motor power supply and reducing the working current of the motor, thereby reducing the heat generated by the motor, extending the service life of the motor and improving the stability of the motor.

[0016] Furthermore, the rotor comprises:

[0017] Insulating sleeves, there are two insulating sleeves, and the two insulating sleeves are spaced apart and respectively sleeved on the motor shaft;

[0018] A rotor core, wherein the rotor core is sleeved on the motor shaft and is located between the two insulating sleeves, and a plurality of insulating wire threading slots are evenly distributed on the outer circumference of the rotor core;

[0019] Armature winding cables, there are multiple armature winding cables, and each armature winding cable is inserted into the corresponding insulating wire threading slot plate, and both ends of each armature winding cable are respectively fixed on the two insulating sleeves, and the armature winding cable is electrically connected to the commutator.

[0020] Furthermore, each of the insulating sleeves comprises:

[0021] An insulating cylinder, wherein the insulating cylinder is sleeved on the motor shaft;

[0022] A clamping plate, the clamping plate is integrally connected to the bottom end of the insulating cylinder, and the clamping plate is sleeved on the motor shaft, and a plurality of radially distributed first branch plates are evenly distributed and integrally connected on the outer circumference of the clamping plate;

[0023] The rotor core includes: a plurality of core plates stacked and sandwiched between two of the clamping plates, the core plates are sleeved on the motor shaft, a plurality of second branch plates distributed radially are evenly distributed and integrally connected on the outer peripheral side of the core plates, the space between two adjacent first branch plates and between two adjacent second branch plates is a receiving space, and the insulating wire threading slot plate is arranged in the receiving space.

[0024] The beneficial effect of adopting the above technical solution is that the insulating wire threading slot plate effectively isolates the rotor core and the armature winding cable, thereby playing a role in high-voltage insulation.

[0025] Furthermore, the free end of each of the second branch plates extends to both sides to form a limiting portion for stopping the insulating wire threading trough plate.

[0026] The beneficial effect of adopting the above technical solution is that the limiting part can limit the insulating wire threading trough plate within the accommodating space to prevent the insulating wire threading trough plate from escaping from the accommodating space.

[0027] The present invention also provides an air pump, comprising: the motor body, and an air pump body,

[0028] The air pump body comprises:

[0029] A pump housing, wherein the bottom end of the pump housing is fixedly connected to the top end of the motor cylinder, and the other end of the motor shaft extends into the pump housing, and a through hole is provided on the side of the pump housing away from the motor shaft;

[0030] An inner pump cover, wherein the inner pump cover is fixedly connected to the pump housing located on the side of the through hole, and a side end of the inner pump cover close to the pump housing is inwardly recessed to form a piston groove, and an air inlet and an air outlet both connected to the piston groove are provided on the inner pump cover;

[0031] An outer pump cover, the outer pump cover is fixedly mounted on the side end of the inner pump cover away from the piston groove, and an air cavity connected to the air outlet is formed between the two, and an air inlet pipe connected to the air inlet and an air outlet pipe connected to the air cavity are arranged on the outer pump cover;

[0032] An eccentric wheel, wherein the eccentric wheel is sleeved on the other end of the motor shaft, and a bearing is sleeved on the outside of the eccentric wheel;

[0033] A piston assembly, wherein the piston assembly is transversely placed inside the pump housing along the axial direction of the through hole, and one end of the piston assembly is fixed to the outer ring of the bearing, and the other end is an elastic piston portion, and the elastic piston portion is passed through the through hole and sandwiched between the pump housing and the inner pump cover, and a piston air chamber is formed between the piston groove and the elastic piston portion;

[0034] Among them, an air intake check valve film and an air outlet check valve film are respectively arranged at the positions of the air inlet and the air outlet on the inner pump cover, the air intake check valve film is located between the inner pump cover and the elastic piston part, and the air outlet check valve film is located between the inner pump cover and the outer pump cover.

[0035] The beneficial effect produced by the above technical solution is that the piston assembly reciprocates left and right under the action of the motor shaft and the eccentric wheel. When the elastic piston part moves to the right, negative pressure is generated in the piston air chamber, and the inlet one-way valve film at the air inlet is away from the air inlet, so that the air inlet is in an open state, and the outside atmosphere enters the piston air chamber through the air inlet. At this time, the outlet one-way valve film at the air outlet is close to the air outlet, so that the air outlet is in a closed state, thereby preventing the gas in the piston air chamber from being discharged through the air outlet; when the elastic piston part moves to the left to compress the air in the piston air chamber, the inlet one-way valve is close to the air inlet, so that the air inlet is in a closed state, and the outlet one-way valve film is away from the air outlet, so that the air outlet is in an open state, and the high-pressure air enters the air cavity through the air outlet and is then discharged through the air outlet pipe.

[0036] Furthermore, the piston assembly comprises:

[0037] A transverse swing arm connecting rod, one end of which is fixed to the outer ring of the bearing, and the other end of which is telescopically arranged in the through hole;

[0038] A bowl-shaped elastic piston, the edge of which is clamped between the pump housing and the inner pump cover, and the middle of the bowl-shaped elastic piston is detachably connected to the other end of the transverse swing arm connecting rod, the raised side of the bowl-shaped elastic piston is adapted to the piston groove and the space between the two forms the piston air chamber, and the intake one-way valve film is located between the inner pump cover and the bowl-shaped elastic piston.

[0039] Furthermore, the piston assembly also includes: a connecting baffle, which is located on the protruding side of the bowl-shaped elastic piston, and the connecting baffle is detachably connected to the other end of the transverse swing arm connecting rod through a connecting bolt, so that the bowl-shaped elastic piston is clamped between the connecting baffle and the other end of the transverse swing arm connecting rod, and the intake check valve film is located between the inner pump cover and the connecting baffle.

[0040] The beneficial effect of adopting the above technical solution is that the bowl-shaped elastic piston and the transverse swing arm connecting rod can be easily disassembled and assembled.

[0041] Furthermore, placement grooves for placing the air inlet check valve film and the air outlet check valve film are respectively opened on the inner pump cover at the positions of the air inlet and the air outlet, and the two placement grooves are respectively located on the two side surfaces of the inner pump cover, and the two placement grooves are each provided with a stop spring for preventing the air inlet check valve film or the air outlet check valve film from falling out.

[0042] Furthermore, a counterweight screw is threaded onto the eccentric wheel.

[0043] The beneficial effect of adopting the above technical solution is that the counterweight screw can be used to balance the weight of the eccentric wheel and the centrifugal force generated by the lateral swing arm connecting rod, which can greatly reduce the vibration and noise generated when the motor is running.

[0044] Furthermore, a heat sink is fixedly mounted on the side end of the outer pump cover away from the inner pump cover.

[0045] The beneficial effect of adopting the above technical solution is that because the bowl-shaped elastic piston in the air pump body compresses the air to do work, a large amount of heat is generated on the air pump body. Therefore, providing a heat sink can improve the heat dissipation performance of the air pump body, quickly dissipate the heat generated by the air pump body to the external environment, and extend the service life of the air pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0047] Figure 1 The accompanying drawing is a schematic cross-sectional structure diagram of a motor for an air pump provided by the present invention.

[0048] Figure 2 The attached figure is a schematic diagram of the structure of the rotor, stator, insulation plate, carbon brush, rectifier and power cable.

[0049] Figure 3 The attached figure is a schematic diagram of the position structure of the rectifier on the insulating plate.

[0050] Figure 4 The accompanying drawing is a schematic diagram of the structure of the rotor.

[0051] Figure 5 The accompanying drawing is a schematic structural diagram of the insulating sleeve.

[0052] Figure 6 The accompanying drawing is a schematic structural diagram of the core plate.

[0053] Figure 7 The attached picture is Figure 1 Schematic diagram of the enlarged structure of part A in the middle.

[0054] Figure 8 The attached picture is Figure 1 Middle top view cross-section.

[0055] Figure 9-10 The attached figure is a schematic diagram of the exploded structure of the air pump body.

[0056] Figure 11-Figure 12 The attached figure is a schematic diagram of the three-dimensional structure of the inner pump cover.

[0057] Fig.13 The attached figure is a schematic diagram of the cross-sectional structure of the inner pump cover.

[0058] Fig.14 The accompanying drawing is a schematic structural diagram of the outer pump cover.

[0059] Among them: 1-motor body, 11-motor cylinder, 12-motor shaft, 13-rotor, 131-insulating sleeve, 1311-insulating cylinder, 1312-clamping plate, 13121-first branch plate, 132-rotor core, 1321-core plate, 13211-second branch plate, 1310-accommodating space, 132111-limiting part, 133-insulating threading slot plate, 134-armature winding cable, 14-stator, 15-commutator, 16-insulating plate, 17-carbon brush, 18-rectifier, 19-power cable, 2-air pump body, 2 1- pump housing, 211- through hole, 22- inner pump cover, 221- piston groove, 222- air inlet, 223- air outlet, 224- placement groove, 23- outer pump cover, 201- air cavity, 24- air inlet pipe, 25- air outlet pipe, 26- eccentric wheel, 27- bearing, 28- piston assembly, 281- lateral swing arm connecting rod, 282- bowl-shaped elastic piston, 283- connecting baffle, 284- connecting bolt, 202- piston air chamber, 29- air inlet check valve film, 30- air outlet check valve film, 31- stop retaining spring, 3- counterweight screw, 4- heat sink. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] The embodiment of the present invention discloses a motor for an air pump, comprising a motor body 1, wherein the motor body 1 comprises:

[0062] Motor cylinder 11,

[0063] The motor shaft 12 is coaxially arranged inside the motor barrel 11, and one end of the motor shaft 12 is rotatably connected to the bottom end of the motor barrel 11, and the other end is rotatably connected to the top end of the motor barrel 11 and extends upward through the top end of the motor barrel 11;

[0064] The rotor 13 is sleeved on the motor shaft 12;

[0065] The stator 14 is fixed on the inner wall of the motor cylinder 11 and sleeved on the outside of the rotor 13;

[0066] The commutator 15 is sleeved on the bottom of the motor shaft 12 and is electrically connected to the rotor 13;

[0067] An insulating plate 16, which is fixedly mounted on the bottom end of the motor cylinder 11 and sleeved on the outside of the commutator 15, and a carbon brush 17 is arranged on the insulating plate 16, and the carbon brush 17 contacts with a contact piece 151 on the commutator 15;

[0068] The rectifier 18 is arranged on the insulating plate 16 and is connected to the

[0069] The carbon brush 17 is electrically connected;

[0070] A power cable 19, one end of which is electrically connected to the rectifier 18, and the other end of which passes through the bottom of the motor cylinder 11 and extends downward to be electrically connected to an external AC power source.

[0071] The rotor 13 comprises:

[0072] Insulating sleeves 131, there are two insulating sleeves 131, and the two insulating sleeves 131 are spaced apart and respectively sleeved on the motor shaft 12;

[0073] The rotor core 132 is sleeved on the motor shaft 12 and is located between the two insulating sleeves 131. A plurality of insulating wire threading slots 133 are evenly distributed on the outer circumference of the rotor core 132;

[0074] The armature winding cable 134 includes a plurality of armature winding cables 134 , and each armature winding cable 134 is passed through a corresponding insulating wire threading slot plate 133 , and both ends of each armature winding cable 134 are respectively fixed on two insulating sleeves 131 , and the armature winding cable 134 is electrically connected to the commutator 15 .

[0075] Each insulating sleeve 131 comprises:

[0076] The insulating cylinder 1311 is sleeved and fixed on the motor shaft 12;

[0077] The clamping plate 1312 is integrally connected to the bottom end of the insulating cylinder 1311, and the clamping plate 1312 is sleeved on the motor shaft 12, and a plurality of radially distributed first branch plates 13121 are evenly distributed and integrally connected on the outer circumference of the clamping plate 1312;

[0078] The rotor core 132 includes: a plurality of core plates 1321 stacked and clamped between two clamping plates 1312, the core plates 1321 are sleeved on the motor shaft 12, a plurality of radially distributed second branch plates 13211 are evenly distributed and integrally connected on the outer peripheral side of the core plate 1321, the space between two adjacent first branch plates 13121 and between two adjacent second branch plates 13211 is a receiving space 1310, and the insulating wire threading slot plate 133 is arranged in the receiving space 1310.

[0079] The free end of each second branch plate 13211 extends toward both sides to form a limiting portion 132111 for stopping the insulating wire threading slot plate 133 .

[0080] The present invention provides an air pump, comprising: the motor body 1 mentioned above, and an air pump body 2,

[0081] The air pump body 2 comprises:

[0082] The pump housing 21, the bottom end of the pump housing 21 is fixedly connected to the top end of the motor barrel 11, and the other end of the motor shaft 12 extends into the pump housing 21, and a through hole 211 is opened on the side of the pump housing 21 away from the motor shaft 12;

[0083] The inner pump cover 22 is fixedly connected to the pump housing 21 located on the side of the through hole 211, and the side end of the inner pump cover 22 close to the pump housing 21 is inwardly recessed to form a piston groove 221, and the inner pump cover 22 is provided with an air inlet 222 and an air outlet 223 both connected to the piston groove 221;

[0084] The outer pump cover 23 is fixedly mounted on the side end of the inner pump cover 22 away from the piston groove 221, and an air cavity 201 communicating with the air outlet 223 is formed between the two. The outer pump cover 23 is provided with an air inlet pipe 24 communicating with the air inlet 222 and an air outlet pipe 25 communicating with the air cavity 201;

[0085] An eccentric wheel 26 is sleeved on the other end of the motor shaft 12, and a bearing 27 is sleeved on the outside of the eccentric wheel 26;

[0086] The piston assembly 28 is disposed transversely inside the pump housing 21 along the axial direction of the through hole 211, and one end of the piston assembly 28 is fixed to the outer ring of the bearing 27, and the other end is an elastic piston portion, and the elastic piston portion is penetrated through the through hole 211 and sandwiched between the pump housing 21 and the inner pump cover 22, and a piston air chamber 202 is formed between the piston groove 221 and the elastic piston portion;

[0087] Among them, an air intake check valve film 29 and an air outlet check valve film 30 are respectively provided at the positions of the air inlet 222 and the air outlet 223 on the inner pump cover 22. The air intake check valve film 29 is located between the inner pump cover 22 and the elastic piston part, and the air outlet check valve film 30 is located between the inner pump cover 22 and the outer pump cover 23.

[0088] The piston assembly 28 comprises:

[0089] A transverse swing arm link 281, one end of which is fixed to the outer ring of the bearing 27, and the other end of which is telescopically arranged in the through hole 211;

[0090] A bowl-shaped elastic piston 282, the edge of which is clamped between the pump housing 21 and the inner pump cover 22, and the middle of the bowl-shaped elastic piston 282 is detachably connected to the other end of the transverse swing arm connecting rod 281, the raised side of the bowl-shaped elastic piston 282 is adapted to the piston groove 221 and the two form a piston air chamber 202, and the intake check valve rubber 29 is located between the inner pump cover 22 and the bowl-shaped elastic piston 282.

[0091] The piston assembly 28 also includes: a connecting baffle 283, which is located on the raised side of the bowl-shaped elastic piston 282, and the connecting baffle 283 is detachably connected to the other end of the transverse swing arm connecting rod 281 through a connecting bolt 284, so that the bowl-shaped elastic piston 282 is clamped between the connecting baffle 283 and the other end of the transverse swing arm connecting rod 281, and the intake check valve rubber 29 is located between the inner pump cover 22 and the connecting baffle 283.

[0092] The inner pump cover 22 is provided with placement grooves 224 for placing the intake check valve film 29 and the exhaust check valve film 30 at the positions of the air inlet 222 and the air outlet 223 respectively. The two placement grooves 224 are respectively located on the two side surfaces of the inner pump cover 22, and the two placement grooves 224 are both provided with a stop spring 31 for preventing the intake check valve film 29 or the exhaust check valve film 30 from falling out.

[0093] A counterweight screw 3 is threadedly connected to the eccentric wheel 26 .

[0094] A heat sink 4 is fixedly mounted on the side end of the outer pump cover 23 away from the inner pump cover 22 , and the heat sink 4 can be a metal heat sink with good heat dissipation efficiency.

[0095] The voltage and power generally used in existing air pumps are 12V, 12W and 24V, 12W. The present invention can use a power supply of 220V and a power of 12W. According to P=U*I and Q=I 2RT, under the same power, resistance and time, the heat generated by the air pump of the present invention is 0.00297 joules, and the heat generated by the existing 12V, 12W and 24V, 12W are 1 joule and 0.5 joule respectively, which are 336 times and 84 times the heat generated by the present invention respectively. Therefore, the present invention achieves the effect of high power, low current and low heat generation of the motor, and prolongs the service life of the motor.

[0096] The working process of the motor body of the present invention is as follows: an external AC power supply supplies power to the armature winding cable through a power cable, a rectifier, a carbon brush, and a commutator. The armature winding cable is energized to generate a magnetic field, which interacts with the stator (permanent magnet) to cause the rotor core to generate torque and rotate, thereby causing the motor shaft to rotate. At the same time, the commutation function of the commutator ensures the continuous rotation of the motor shaft.

[0097] The working process of the air pump body of the present invention is as follows: the piston assembly reciprocates left and right under the action of the motor shaft and the eccentric wheel. When the elastic piston part moves to the right, negative pressure is generated in the piston air chamber, and the air inlet one-way valve film at the air inlet is away from the air inlet, so that the air inlet is in an open state, and the outside atmosphere enters the piston air chamber through the air inlet. At this time, the air outlet one-way valve film at the air outlet is close to the air outlet, so that the air outlet is in a closed state, thereby preventing the gas in the piston air chamber from being discharged through the air outlet; when the elastic piston part moves to the left to compress the air in the piston air chamber, the air inlet one-way valve is close to the air inlet, so that the air inlet is in a closed state, and the air outlet one-way valve film is away from the air outlet, so that the air outlet is in an open state, and the high-pressure air enters the air cavity through the air outlet, and then is discharged through the air outlet pipe, thereby realizing the function of the air pump, and the air pump has a compact structure, a small size, and is easy to carry.

[0098] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0099] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air pump, characterized in that: include: The motor body (1) also includes an air pump body (2). The motor body (1) comprises: Motor cylinder (11), a motor shaft (12), the motor shaft (12) being coaxially arranged inside the motor barrel (11), one end of the motor shaft being rotatably connected to the bottom end of the motor barrel (11), and the other end of the motor shaft being rotatably connected to the top end of the motor barrel (11) and extending upward through the top end of the motor barrel (11); A rotor (13), wherein the rotor (13) is sleeved on the motor shaft (12); A stator (14), the stator (14) being fixed on the inner wall of the motor cylinder (11) and sleeved on the outside of the rotor (13); A commutator (15), the commutator (15) being sleeved on the bottom of the motor shaft (12) and electrically connected to the rotor (13); An insulating plate (16) fixedly mounted on the bottom end of the motor cylinder (11) and is sleeved outside the commutator (15); a carbon brush (17) is provided on the insulating plate (16); the carbon brush (17) is in contact with a contact piece (151) on the commutator (15); A rectifier (18), wherein the rectifier (18) is arranged on the insulating plate (16) and is connected to the The carbon brush (17) is electrically connected; A power cable (19), one end of the power cable (19) being electrically connected to the rectifier (18), and the other end of the power cable (19) passing through the bottom end of the motor cylinder (11) and extending downward to be electrically connected to an external AC power source; The rotor (13) comprises: Insulating sleeves (131), there are two insulating sleeves (131), and the two insulating sleeves (131) are spaced apart and respectively sleeved on the motor shaft (12); A rotor core (132), the rotor core (132) being sleeved on the motor shaft (12) and located between the two insulating sleeves (131), and a plurality of insulating wire threading slot plates (133) being evenly distributed on the outer circumference of the rotor core (132); An armature winding cable (134), wherein there are a plurality of armature winding cables (134), and each armature winding cable (134) is inserted into the insulating wire threading slot plate (133) corresponding to the armature winding cable (134), and both ends of each armature winding cable (134) are respectively fixed to the two insulating sleeves (131), and the armature winding cable (134) is electrically connected to the commutator (15); Each of the insulating sleeves (131) comprises: An insulating cylinder (1311), the insulating cylinder (1311) being sleeved and fixed on the motor shaft (12); A clamping plate (1312), the clamping plate (1312) being integrally connected to the bottom end of the insulating cylinder (1311), the clamping plate (1312) being sleeved on the motor shaft (12), and a plurality of radially distributed first branch plates (13121) being uniformly distributed and integrally connected on the outer circumference of the clamping plate (1312); The rotor core (132) comprises: a plurality of core plates (1321) stacked and sandwiched between two clamping plates (1312); the core plates (1321) are sleeved on the motor shaft (12); a plurality of second branch plates (13211) distributed radially are evenly distributed and integrally connected on the outer peripheral side of the core plates (1321); the space between two adjacent first branch plates (13121) and between two adjacent second branch plates (13211) is a receiving space (1310); and the insulating wire threading slot plate (133) is arranged in the receiving space (1310); The free end of each second branch plate (13211) extends to both sides to form a limiting portion (132111) for stopping the insulating wire threading slot plate (133); The air pump body (2) comprises: A pump housing (21), wherein the bottom end of the pump housing (21) is fixedly connected to the top end of the motor barrel (11), and the other end of the motor shaft (12) extends into the pump housing (21), and a through hole (211) is formed on the side of the pump housing (21) away from the motor shaft (12); an inner pump cover (22), the inner pump cover (22) being fixedly connected to the pump housing (21) located on the side of the through hole (211), and a side end of the inner pump cover (22) close to the pump housing (21) is inwardly recessed to form a piston groove (221), and the inner pump cover (22) is provided with an air inlet (222) and an air outlet (223) both of which are in communication with the piston groove (221); an outer pump cover (23), the outer pump cover (23) being fixedly mounted on a side end of the inner pump cover (22) away from the piston groove (221), and an air cavity (201) communicating with the air outlet (223) is formed between the two, and an air inlet pipe (24) communicating with the air inlet (222) and an air outlet pipe (25) communicating with the air cavity (201) are provided on the outer pump cover (23); An eccentric wheel (26), the eccentric wheel (26) being sleeved on the other end of the motor shaft (12), and a bearing (27) being sleeved on the outside of the eccentric wheel (26); A piston assembly (28), the piston assembly (28) being disposed transversely inside the pump housing (21) along the axial direction of the through hole (211), and one end of the piston assembly (28) being fixed to the outer ring of the bearing (27), and the other end being an elastic piston portion, and the elastic piston portion being passed through the through hole (211) and sandwiched between the pump housing (21) and the inner pump cover (22), and a piston air chamber (202) being formed between the piston groove (221) and the elastic piston portion; Wherein, an air inlet check valve rubber sheet (29) and an air outlet check valve rubber sheet (30) are respectively arranged at the positions of the air inlet (222) and the air outlet (223) on the inner pump cover (22); the air inlet check valve rubber sheet (29) is located between the inner pump cover (22) and the elastic piston portion, and the air outlet check valve rubber sheet (30) is located between the inner pump cover (22) and the outer pump cover (23); The piston assembly (28) comprises: A transverse swing arm connecting rod (281), wherein one end of the transverse swing arm connecting rod (281) is fixed to the outer ring of the bearing (27), and the other end of the transverse swing arm connecting rod (281) is telescopically arranged in the through hole (211); a bowl-shaped elastic piston (282), the edge of the bowl-shaped elastic piston (282) being sandwiched between the pump housing (21) and the inner pump cover (22), and the middle of the bowl-shaped elastic piston (282) being detachably connected to the other end of the transverse swing arm connecting rod (281), the convex side of the bowl-shaped elastic piston (282) being adapted to the piston groove (221) and the space between the two forming the piston air chamber (202), and the air intake check valve film (29) being located between the inner pump cover (22) and the bowl-shaped elastic piston (282); The inner pump cover (22) is provided with placement grooves (224) for placing the inlet check valve film (29) and the outlet check valve film (30) at the positions of the inlet port (222) and the outlet port (223), respectively. The two placement grooves (224) are respectively located on two side surfaces of the inner pump cover (22), and the two placement grooves (224) are provided with stopper springs (31) for preventing the inlet check valve film (29) or the outlet check valve film (30) from falling out. A counterweight screw (3) is threaded onto the eccentric wheel (26).

2. An air pump according to claim 1, characterized in that: The piston assembly (28) further comprises: a connecting baffle (283), the connecting baffle (283) being located on the protruding side of the bowl-shaped elastic piston (282), and the connecting baffle (283) being detachably connected to the other end of the transverse swing arm connecting rod (281) via a connecting bolt (284), so that the bowl-shaped elastic piston (282) is clamped between the connecting baffle (283) and the other end of the transverse swing arm connecting rod (281), and the intake check valve film (29) is located between the inner pump cover (22) and the connecting baffle (283).

3. An air pump according to claim 1, characterized in that: A heat sink (4) is fixedly mounted on the side end of the outer pump cover (23) away from the inner pump cover (22).

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