Waterproof plastic package direct current motor

Abstract

The invention discloses a waterproof plastic package direct current motor, and relates to the technical field of motors, the waterproof plastic package direct current motor comprises a plastic package shell, a stator is fixedly arranged in the plastic package shell, one end of the plastic package shell is fixedly connected with a plastic package cover, a rotor is rotatably arranged in the plastic package cover, and one end of the plastic package cover is fixedly connected with a sealing shell. A second adsorption cotton pad is fixedly arranged in the sealing shell, a piston plate is slidably connected to the interior of the sealing shell, an exhaust frame is fixedly connected to the outer wall of the plastic packaging shell, a plurality of exhaust holes are formed in the outer wall of the exhaust frame, and an exhaust pipe is fixedly connected between the sealing shell and the exhaust frame; by regularly extruding the first adsorption cotton pad and the second adsorption cotton pad, it can be ensured that water is not accumulated in the pad for a long time, so that the continuous water absorption performance is kept, and the overall waterproof capacity of the motor is improved.

Description

Technical Field

[0001] The invention relates to the technical field of motor equipment, and in particular to a waterproof plastic-sealed DC motor. Background Art

[0002] A plastic-encapsulated DC motor is a DC motor that uses plastic packaging technology. Because the internal environment of a washing machine is humid, the motor needs to have good waterproof and moisture-proof properties. Therefore, a plastic-encapsulated DC motor is generally used inside a washing machine. Because a plastic-encapsulated DC motor uses plastic packaging technology, it can effectively prevent moisture from invading the inside of the motor and ensure the normal operation of the motor.

[0003] Since a large amount of water vapor is generated during the operation of the washing machine, part of the water vapor adheres to the shaft and penetrates through the connection between the shaft and the plastic cover. When the existing plastic-sealed DC motor is in use, an adsorption cotton pad is arranged on the surface of the shaft to absorb the water stains on the surface of the shaft. When the above-mentioned existing plastic-sealed DC motor is in use, the absorbent cotton pad can absorb water stains on the surface of the shaft, but after long-term use, the absorbent cotton pad is easily saturated, which reduces the water absorption efficiency and makes it impossible to absorb water, resulting in the problem of reduced waterproof performance. The plastic-sealed DC motor adopts plastic packaging technology, and the thermal conductivity of the plastic shell is relatively poor. The motor will generate a lot of heat during operation. If the heat cannot be dissipated in time, it will cause the internal temperature of the motor to rise. Excessive temperature will accelerate the aging of the waterproof material inside the motor, thereby causing a decrease in waterproof performance. Summary of the invention

[0004] The purpose of the present invention is to propose a waterproof plastic-sealed DC motor in order to solve the problem that the water absorption efficiency is reduced, resulting in the inability to absorb water, causing the waterproof performance to decrease and the motor heat dissipation to be poor.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technology: a waterproof plastic-sealed DC motor: comprising a plastic-sealed shell, a stator is fixedly arranged inside the plastic-sealed shell, one end of the plastic-sealed shell is fixedly connected to a plastic-sealed cover, a rotor is rotatably arranged inside the plastic-sealed cover, one end of the plastic-sealed cover is fixedly connected to a sealing shell, a second adsorption cotton pad is fixedly arranged inside the sealing shell, a piston plate is slidably connected inside the sealing shell, an outer wall of the plastic-sealed shell is fixedly connected to an exhaust frame, the outer wall of the exhaust frame is provided with a plurality of exhaust holes, and an exhaust pipe is fixedly connected between the sealing shell and the exhaust frame; The piston plate is driven to slide back and forth inside the sealing shell and squeeze the second adsorption cotton pad so that the droplets adsorbed inside the second adsorption cotton pad are squeezed out. At the same time, when the piston plate reciprocates, the airflow inside the sealing shell can be discharged into the exhaust frame through the exhaust pipe, and the exhaust frame discharges the airflow through the exhaust hole and blows it toward the surface of the plastic shell.

[0006] As a further description of the above technology, a waterproof plastic-sealed DC motor: The rotor comprises a rotating shaft, which is rotatably connected to the inside of the plastic cover, one end of the rotating shaft is fixedly connected to a reciprocating screw, a surface of the reciprocating screw is threadedly connected to an electromagnetic plate, and one end of the electromagnetic plate is rotatably connected to one end of a piston plate.

[0007] As a further description of the above technology, a waterproof plastic-sealed DC motor: A positioning rod is slidably connected inside the electromagnetic plate, and the positioning rod is fixedly connected to one end of the plastic cover.

[0008] As a further description of the above technology, a waterproof plastic-sealed DC motor: A drainage one-way valve is fixedly arranged on the outer wall of the sealing shell, a sealing ring is fixedly connected to the outer wall of the sealing shell, a first adsorption cotton pad is fixedly arranged on one side of the plastic cover, and the inner walls of the sealing ring, the first adsorption cotton pad and the second adsorption cotton pad are all attached to the outer wall of the rotating shaft.

[0009] As a further description of the above technology, a waterproof plastic-sealed DC motor: The outer wall of the plastic shell is fixedly connected with a plurality of heat conducting plates, and the heat conducting plates all penetrate the inner wall of the plastic shell, a plurality of heat dissipating plates are fixedly arranged inside the heat conducting plates, the inner wall of the heat dissipating plates is provided with a plurality of heat dissipating holes, and sealing strips are arranged at the connection points between the plurality of heat conducting plates and the plastic shell.

[0010] As a further description of the above technology, a waterproof plastic-sealed DC motor: The sealing shell includes an air intake check valve and an exhaust check valve, both of which are fixedly connected to the outer wall of the sealing shell, one end of the air intake check valve is fixedly connected to a filter plate, and the exhaust check valve is fixedly connected to one end of the exhaust pipe.

[0011] As a further description of the above technology, a waterproof plastic-sealed DC motor: A protrusion is fixedly connected to one end of the piston plate, a magnetic rod is slidably connected to one side of the electromagnetic plate, a first spring is fixedly connected between the magnetic rod and the electromagnetic plate, the piston plate is made of magnetic material, and the electromagnetic plate and the piston plate are adsorbed on each other after power is turned on, a brush is fixedly connected to one end of the piston plate, a connecting block is rotatably provided on one side of the piston plate, and an elastic telescopic rod is fixedly connected between the connecting plate and the sealing shell.

[0012] As a further description of the above technology, a waterproof plastic-sealed DC motor: A limiting groove is arranged on the surface of the piston plate, a limiting rod is slidably connected inside the limiting groove, and one end of the limiting rod is fixedly connected to one end of the plastic cover.

[0013] As a further description of the above technology, a waterproof plastic-sealed DC motor: The limiting groove includes a moving section, a cleaning section is arranged on one side of the moving section, a reset section is arranged at one end of the cleaning section, a rotating section is arranged on one side of the reset section, and the moving section, the cleaning section, the reset section and the rotating section are connected.

[0014] As a further description of the above technology, a waterproof plastic-sealed DC motor: The depth of the moving section is greater than the depth of the resetting section, and the depth of the resetting section is greater than the depth of the cleaning section.

[0015] In summary, due to the use of the above-mentioned technology to provide a waterproof plastic-sealed DC motor, the beneficial effects of the present invention are: 1. By providing a piston plate, a sealing ring and a second adsorption cotton pad, when water droplets condense on the surface of the rotating shaft, the water flow is blocked by the sealing ring, and some of the water droplets enter the second adsorption cotton pad along the rotating shaft. The second adsorption cotton pad can absorb the water droplets, and at the same time, the piston plate reciprocates inside the sealing shell, and the piston plate squeezes the second adsorption cotton pad, so that the water inside the second adsorption cotton pad is squeezed out, and at the same time, the electromagnetic plate squeezes the first adsorption cotton pad when it moves. By regularly squeezing the first adsorption cotton pad and the second adsorption cotton pad, it can be ensured that water will not accumulate inside for a long time, thereby maintaining its continuous water absorption performance and improving the overall waterproof ability of the motor. At the same time, the piston reciprocates in the sealing shell, and the airflow inside the sealing shell can be discharged into the exhaust frame and discharged through the exhaust hole. The airflow blows to the heat sink, and the motor can be cooled. It is avoided that the internal temperature of the plastic-sealed DC motor is too high when in use, resulting in a decrease in the performance of the waterproof material inside the motor, thereby affecting the waterproof effect of the motor.

[0016] 2. By providing a brush and a filter plate, when the piston plate moves, the piston plate drives the brush to move synchronously. The brush can clean the impurities on the surface of the filter plate to avoid impurities adhering to the filter plate. The impurities block the filter plate, resulting in reduced air intake efficiency of the air intake check valve and reduced heat dissipation efficiency of the motor, thereby avoiding the high temperature environment from accelerating the aging and failure of the waterproof material, thereby reducing the overall waterproof performance.

[0017] 3. By setting a limit groove and a limit rod, when the brush finishes cleaning the filter plate, the brush can be driven to rotate so that the brush is away from the surface of the filter plate, and when the brush resets, the limit rod slides in the reset section of the limit groove, so that the brush remains away from the filter plate, avoiding blocking the top of the filter plate when the brush resets, resulting in a decrease in the air intake efficiency, thereby causing the problem of reduced heat dissipation efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1Shows a schematic diagram of the overall structure according to the present invention; Figure 2 An exploded view of the overall structure according to the present invention is shown; Figure 3 A schematic diagram of the heat dissipation plate structure according to the present invention is shown; Figure 4 A schematic diagram of the structure of a plastic package shell according to the present invention is shown; Figure 5 A structural cross-sectional view of a plastic package shell according to the present invention is shown; Figure 6 It shows a schematic structural diagram of the exhaust frame according to the present invention; Figure 7 A schematic diagram of the structure of the piston plate and the rotating shaft according to the present invention is shown; Figure 8 A schematic structural diagram of a piston plate according to the present invention is shown; Fig. 9 A schematic diagram showing the structure of the limiting rod and the limiting groove according to the present invention is shown; Fig.10 A schematic structural diagram of an electromagnetic plate and a bump according to the present invention is shown.

[0019] Legend: 1. Plastic shell; 11. Stator; 12. Heat conducting plate; 121. Heat dissipation plate; 122. Heat dissipation hole; 2. Rotor; 21. Rotating shaft; 22. Reciprocating screw rod; 23. Electromagnetic plate; 231. Positioning rod; 232. Magnetic rod; 233. First spring; 3. Plastic cover; 31. Limit rod; 32. First adsorption cotton pad; 4. Sealing shell; 41. Second adsorption cotton pad; 42. Sealing ring; 43. Drainage One-way valve; 44, piston plate; 441, brush; 442, bump; 443, limit groove; 4431, moving section; 4432, cleaning section; 4433, reset section; 4434, rotating section; 444, shielding part; 45, air intake one-way valve; 451, filter plate; 46, exhaust one-way valve; 461, exhaust pipe; 462, exhaust rack; 463, exhaust hole; 47, elastic telescopic rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technology of a waterproof plastic-sealed DC motor 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.

[0021] like Figure 1-Figure 9As shown, the present invention provides: a waterproof plastic-sealed DC motor, comprising a plastic-sealed shell 1, a stator 11 is fixedly arranged inside the plastic-sealed shell 1, a plastic-sealed cover 3 is fixedly connected to one end of the plastic-sealed shell 1, a rotor 2 is rotatably arranged inside the plastic-sealed cover 3, a sealing shell 4 is fixedly connected to one end of the plastic-sealed cover 3, a second adsorption cotton pad 41 is fixedly arranged inside the sealing shell 4, a piston plate 44 is slidably connected inside the sealing shell 4, an exhaust frame 462 is fixedly connected to the outer wall of the plastic-sealed shell 1, a plurality of exhaust holes 463 are arranged on the outer wall of the exhaust frame 462, and an exhaust pipe 461 is fixedly connected between the sealing shell 4 and the exhaust frame 462; The piston plate 44 is driven to slide back and forth inside the sealing shell 4, and the second adsorption cotton pad 41 is squeezed to squeeze out the droplets adsorbed inside the second adsorption cotton pad 41. At the same time, when the piston plate 44 reciprocates, the airflow inside the sealing shell 4 can be discharged into the exhaust frame 462 through the exhaust pipe 461, and the exhaust frame 462 discharges the airflow through the exhaust hole 463 to blow it toward the surface of the plastic shell 1.

[0022] like Figure 4-Figure 5 As shown, the sealed shell 4 includes an air intake check valve 45 and an air exhaust check valve 46 , and the air intake check valve 45 and the air exhaust check valve 46 are both fixedly connected to the outer wall of the sealed shell 4 .

[0023] Specifically, the air intake check valve 45 is used to suck the external air flow into the interior of the sealed shell 4, and the exhaust check valve 46 is used to discharge the gas inside the sealed shell 4 into the interior of the exhaust duct. At the same time, under normal circumstances, the air intake check valve 45 and the exhaust check valve 46 can prevent external moisture from entering the interior of the sealed shell 4, thereby causing the problem of moisture droplets adhering to the surface of the rotating shaft 21.

[0024] like Figure 1-Figure 3 As shown, a plurality of heat conducting plates 12 are fixedly connected to the outer wall of the plastic shell 1, and the heat conducting plates 12 all penetrate the inner wall of the plastic shell 1, a plurality of heat dissipating plates 121 are fixedly arranged inside the heat conducting plates 12, and a plurality of heat dissipating holes 122 are arranged on the inner wall of the heat dissipating plates 121, and sealing strips are arranged at the connection points between the plurality of heat conducting plates 12 and the plastic shell 1.

[0025] Specifically, the heat conducting plate 12 is installed through the outer wall of the sealing shell 4. Therefore, when the motor is working, the temperature inside the motor is transferred to the heat conducting plate 12. One end of the heat conducting plate 12 is in contact with the outside world. The heat conducting plate 12 transfers the heat to the surface of the heat sink 121. The surface temperature of the heat sink 121 increases and contacts with the external airflow. The external airflow passes through the heat dissipation holes 122 and increases the heat dissipation area of ​​the heat sink 121, so that the heat sink 121 can quickly dissipate the heat of the heat conducting plate 12, thereby improving the heat dissipation effect of the motor itself.

[0026] Specifically, the plastic-sealed DC motor is generally used in a washing machine because of its good waterproof ability. When the plastic-sealed DC motor is used in a washing machine, a large amount of water vapor will be generated during operation of the washing machine. The water vapor flows with the air and adheres to the surface of the motor shaft 21. Large water droplets will be thrown out as the motor shaft 21 rotates. Part of the water vapor adheres to the shaft 21 and penetrates through the connection between the shaft 21 and the plastic cover 3, thereby causing the problem of reduced service life of the motor. At the same time, the plastic-sealed DC motor adopts plastic packaging technology, and the thermal conductivity of the plastic shell is relatively poor. The motor will generate a large amount of heat during operation. If the heat cannot be dissipated in time, it will cause the internal temperature of the motor to rise. Excessive temperature will accelerate the aging of the waterproof material inside the motor, thereby causing the problem of reduced waterproof performance. In order to solve the above problems, the present invention is used as follows: when the plastic-encapsulated DC motor is used, the motor is powered on and starts to work. The magnetic field generated by the stator 11 interacts with the electromagnetic plate 23 on the rotor 2 to rotate the rotor 2. When the motor is used in a washing machine, the plastic-encapsulated shell 1 and the plastic-encapsulated cover 3 can prevent moisture from damaging the electrical components inside the motor. When the motor is working, the moisture on the surface of the rotating shaft 21 enters the interior of the sealing shell 4 through the sealing ring 42. At this time, the moisture on the surface of the rotating shaft 21 can be absorbed by the second adsorption cotton pad 41, and at the same time, the internal piston plate 44 is driven to reciprocate inside the sealing shell 4, so that the piston plate 44 contacts and squeezes the second adsorption cotton pad 41, so that the water stains absorbed by the inner wall of the second adsorption cotton pad 41 are squeezed out; Then the piston plate 44 will enter the sealed shell 4 and reciprocate, so that the external gas will enter the sealed shell 4 through the air intake check valve 45, and then be discharged into the exhaust pipe through the exhaust check valve 46. The gas will then be discharged into the exhaust frame 462, and finally discharged from the exhaust hole 463 to the heat conduction plate 12 and the heat sink 121 on the surface of the motor. The air flow rate increases, so that the heat dissipation effect of the heat sink 121 on the heat conduction plate 12 is improved, thereby improving the heat dissipation effect of the motor.

[0027] The present invention can ensure that moisture will not accumulate inside the second adsorption cotton pad 41 for a long time by periodically squeezing the second adsorption cotton pad 41, thereby maintaining its continuous water absorption performance and improving the overall waterproof ability of the motor. It can also generate airflow and blow the airflow toward the heat sink 121 to dissipate heat for the motor, thereby preventing the internal temperature of the plastic-sealed DC motor from being too high when in use, resulting in a decrease in the performance of the waterproof material inside the motor, thereby affecting the waterproof effect of the motor.

[0028] like Figure 5-Figure 6As shown, the rotor 2 includes a rotating shaft 21, and the rotating shaft 21 is rotatably connected to the inside of the plastic cover 3. One end of the rotating shaft 21 is fixedly connected to a reciprocating screw 22, and the surface of the reciprocating screw 22 is threadedly connected to an electromagnetic plate 23, one end of the electromagnetic plate 23 is rotatably connected to one end of a piston plate 44, and a positioning rod 231 is slidably connected to the inside of the electromagnetic plate 23, and the positioning rod 231 is fixedly connected to one end of the plastic cover 3.

[0029] Specifically, the rotor 2 drives the rotating shaft 21 to rotate, the rotating shaft 21 drives the reciprocating screw 22 to rotate, the reciprocating screw 22 drives the electromagnetic plate 23 to slide back and forth on the positioning rod 231, and the electromagnetic plate 23 drives the piston plate 44 to reciprocate inside the sealing shell 4, so that the piston plate 44 can squeeze the second adsorption cotton pad 41 while exhausting the air flow to blow to the heat sink 121, and the heat sink 121 is cooled.

[0030] like Figure 5 As shown, a drainage one-way valve 43 is fixedly provided on the outer wall of the sealing shell 4, a sealing ring 42 is fixedly connected to the outer wall of the sealing shell 4, a first adsorption cotton pad 32 is fixedly provided on one side of the plastic cover 3, and the inner walls of the sealing ring 42, the first adsorption cotton pad 32 and the second adsorption cotton pad 41 are all attached to the outer wall of the rotating shaft 21.

[0031] Specifically, when the piston plate 44 squeezes the second adsorption cotton pad 41, water generated by the squeezing of the second adsorption cotton pad 41 falls into the sealing shell 4, and at the same time, during the squeezing process of the piston plate 44, the drainage one-way valve 43 is opened so that water droplets can be discharged through the drainage one-way valve 43. When the piston plate 44 is away from the second adsorption cotton pad 41, the drainage one-way valve 43 is closed to prevent external gas from entering. When the electromagnetic plate 23 resets, the electromagnetic plate 23 squeezes the first adsorption cotton pad 32 so that the water inside the first adsorption cotton pad 32 is squeezed out. The first adsorption cotton pad 32 is used to absorb droplets attached to the surface of the reciprocating screw 22, and then the discharged droplets follow the air flow into the exhaust frame 462, and are finally discharged through the exhaust hole 463.

[0032] like Figure 5-Figure 7 As shown, one end of the intake check valve 45 is fixedly connected to a filter plate 451 , the exhaust check valve 46 is fixedly connected to one end of an exhaust pipe 461 , and one end of the piston plate 44 is fixedly connected to a brush 441 .

[0033] Specifically, when the air intake check valve 45 inhales external air, since the plastic-sealed DC motor acts inside the washing machine, impurities such as clothing fibers or hair will be diffused from the outside. Therefore, a filter plate 451 is installed at the air intake end of the air intake check valve 45. The filter plate 451 filters the above impurities. However, when the above impurities accumulate to a large extent, the impurities will block the air flow channel of the filter plate 451, affecting the smooth flow of the gas, thereby causing the problem of reduced heat dissipation efficiency of the motor.

[0034] In order to solve the above problem, the present invention is used as follows: when the piston plate 44 is away from the second adsorption cotton pad 41, the piston plate 44 drives the brush 441 to move synchronously, the brush 441 contacts the upper surface of the filter plate 451, and the brush 441 can clean the impurities above the filter plate 451.

[0035] In the present invention, the piston plate 44 is reset and when the exhaust check valve 46 is exhausting, the brush 441 can clean the impurities on the surface of the filter plate 451 to prevent the impurities from adhering to the filter plate 451 and clogging the filter plate 451 with impurities, thereby reducing the intake efficiency of the intake check valve 45 and reducing the heat dissipation efficiency of the motor, thereby avoiding the high temperature environment from accelerating the aging and failure of the waterproof material, thereby reducing the overall waterproof performance.

[0036] like Figure 7-Figure 9 As shown, a shielding portion 444 is provided on one side of the piston plate 44, a limiting groove 443 is provided on the surface of the piston plate 44, the limiting groove 443 is internally slidably connected to a limiting rod 31, one end of the limiting rod 31 is fixedly connected to one end of the plastic cover 3, the limiting groove 443 includes a moving section 4431, a cleaning section 4432 is provided on one side of the moving section 4431, a reset section 4433 is provided at one end of the cleaning section 4432, a rotating section 4434 is provided on one side of the reset section 4433, the moving section 4431, the cleaning section 4432, the reset section 4433 and the rotating section 4434 are connected, the depth of the moving section 4431 is greater than the depth of the reset section 4433, and the depth of the reset section 4433 is greater than the depth of the cleaning section 4432.

[0037] Specifically, after the brush 441 cleans the filter plate 451, the piston plate 44 moves toward the second adsorption cotton pad 41. At this time, the piston plate 44 drives the brush 441 to move on the filter plate 451. During the movement, the air intake check valve 45 will work to adsorb the airflow through the filter plate 451, but the brush 441 will partially block the filter plate 451, thereby reducing the air intake efficiency of the filter plate 451.

[0038] In order to avoid the above problems, in the initial state, the limiting rod 31 is in the moving section 4431 of the limiting groove 443. When the piston plate 44 is working, the piston plate 44 moves to one side of the first adsorption cotton pad 32. At this time, the limiting rod 31 slides inside the moving section 4431, and the piston plate 44 drives the brush 441 to move toward the surface of the filter plate 451. At this time, the blocking portion 444 of the piston plate 44 blocks the bottom of the intake check valve 45, and the exhaust check valve 46 opens and performs exhaust work. When the limiting rod 31 is at the connection between the moving section 4431 and the cleaning section 4432, the brush 441 covers the surface of the filter plate 451, and then the limiting rod 31 slides inside the cleaning section 4432, the piston plate 44 rotates, and the rotation of the piston plate 44 drives the brush 441 to rotate. The brush 441 moves on the surface of the filter plate 451 and cleans the impurities on the surface of the filter plate 451, and the piston plate 44 drives the blocking portion 444 to block the bottom of the intake check valve 45. The shielding portion 444 blocks the bottom of the air intake check valve 45 to prevent the air intake check valve 45 from opening after the motor stops working, so that external moisture enters the interior of the sealing shell 4, causing the first adsorption cotton pad 32 to absorb more moisture and make it impossible to absorb the droplets on the surface of the rotating shaft 21, thereby affecting the waterproof operation of the motor.

[0039] like Figure 7-10 As shown, one end of the piston plate 44 is fixedly connected with a protrusion 442, one side of the electromagnetic plate 23 is slidably connected with a magnetic rod 232, a first spring 233 is fixedly connected between the magnetic rod 232 and the electromagnetic plate 23, the piston plate 44 is a magnetic material, and the electromagnetic plate 23 and the piston plate 44 are adsorbed on each other after power is turned on, one end of the piston plate 44 is fixedly connected with a brush 441, one side of the piston plate 44 is rotatably provided with a connecting block, and an elastic telescopic rod 47 is fixedly connected between the connecting plate and the sealing shell 4.

[0040] Specifically, when the above-mentioned motor stops working, the electromagnetic plate 23 is powered off, so that the first spring 233 drives the magnetic rod 232 to move away from one side of the protrusion 442. At this time, the magnetic rod 232 releases the limit on the protrusion 442, so that the piston plate 44 is pulled by the elastic telescopic rod 47, and the elastic telescopic rod 47 can drive the piston plate 44 to move toward the second adsorption cotton pad 41. At this time, the limit rod 31 is at the junction of the rotating section 4434 and the moving section 4431, and the piston plate 44 is in the initial position. At this time, the exhaust check valve 46 is closed, and the rotation of the piston plate 44 drives its shielding part 444 to rotate synchronously, so that the shielding part 444 blocks the bottom of the intake check valve 45 to avoid To prevent external moisture from entering the interior of the sealed shell 4, the first adsorption cotton pad 32 absorbs more moisture and is unable to absorb droplets on the surface of the rotating shaft 21. When the motor is working, the electromagnetic plate 23 is energized, and the electromagnetic plate 23 adsorbs the piston plate 44. At the same time, the magnetic rod 232 moves toward the side of the output shaft and squeezes the first spring 233. The piston plate 44 drives the protrusion 442 to move. The protrusion 442 squeezes the magnetic rod 232 through its inclined surface, so that the magnetic rod 232 rises. When the protrusion 442 contacts the electromagnetic plate 23, the magnetic rod 232 limits the protrusion 442. At this time, the reciprocating screw 22 rotates, and the piston plate 44 can be driven to reciprocate through the electromagnetic plate 23.

[0041] Working principle: When using the motor, the motor and the electromagnetic plate 23 are energized, the electromagnetic plate 23 is energized, the electromagnetic plate 23 adsorbs the piston plate 44, and at the same time, the magnetic rod 232 moves to one side of the output shaft and squeezes the first spring 233, the piston plate 44 drives the protrusion 442 to move, the protrusion 442 squeezes the magnetic rod 232 through its inclined surface, so that the magnetic rod 232 rises, when the protrusion 442 and the electromagnetic plate 23 are in contact, the magnetic rod 232 limits the protrusion 442, the motor works, the magnetic field generated by the stator 11 interacts with the electromagnetic plate 23 on the rotor 2, so that the rotor 2 rotates, the rotor 2 drives the rotating shaft 21 to rotate, the rotating shaft 21 drives the reciprocating screw 22 to rotate, the reciprocating screw 22 drives the electromagnetic plate 23 to slide back and forth on the positioning rod 231, the electromagnetic plate 23 drives the piston plate 44 to reciprocate inside the sealing shell 4, that is, the piston plate 44 is driven to reciprocate through the electromagnetic plate 23; When the motor is used in a washing machine, the plastic shell 1 and the plastic cover 3 can prevent moisture from damaging the electrical components inside the motor. When the motor is working, the moisture on the surface of the shaft 21 enters the interior of the sealing shell 4 through the sealing ring 42. At this time, the moisture on the surface of the shaft 21 can be absorbed by the second adsorbent cotton pad 41. The piston plate 44 reciprocates inside the sealing shell 4, so that the piston plate 44 contacts and squeezes the second adsorbent cotton pad 41, so that the water stains absorbed by the inner wall of the second adsorbent cotton pad 41 are squeezed out. When the piston plate 44 squeezes the second adsorbent cotton pad 41, The water produced by the squeezing of the second adsorption cotton pad 41 falls into the sealing shell 4. At the same time, during the squeezing process of the piston plate 44, the drainage check valve 43 is opened, so that the water droplets can be discharged through the drainage check valve 43. When the piston plate 44 is away from the second adsorption cotton pad 41, the drainage check valve 43 is closed to prevent the outside gas from entering. When the electromagnetic plate 23 is reset, the electromagnetic plate 23 squeezes the first adsorption cotton pad 32, so that the water inside the first adsorption cotton pad 32 is squeezed out. The first adsorption cotton pad 32 is used to absorb the droplets attached to the surface of the reciprocating screw 22, and then the discharged droplets follow the air flow and are discharged into the exhaust frame 462; In the initial state, the limiting rod 31 is in the moving section 4431 of the limiting groove 443. When the piston plate 44 is working, the piston plate 44 moves to one side of the first adsorption cotton pad 32. At this time, the limiting rod 31 slides inside the moving section 4431, and the piston plate 44 drives the brush 441 to move toward the surface of the filter plate 451. At this time, the shielding portion 444 of the piston plate 44 shields the lower part of the intake check valve 45, and the exhaust check valve 46 opens and performs exhaust work. The gas is then discharged into the exhaust frame 462, and finally discharged from the exhaust hole 463 to the heat conducting plate 12 and the heat dissipation plate 121 on the surface of the motor. The air flow rate increases, so that the heat dissipation effect of the heat dissipation plate 121 on the heat conducting plate 12 is improved; When the limiting rod 31 is at the connection between the moving section 4431 and the cleaning section 4432, the brush 441 covers the surface of the filter plate 451, and then the limiting rod 31 slides inside the cleaning section 4432, the piston plate 44 rotates, and the rotation of the piston plate 44 drives the brush 441 to rotate. The brush 441 moves on the surface of the filter plate 451 and cleans the impurities on the surface of the filter plate 451, and the piston plate 44 drives the shielding part 444 to rotate, so that the lower part of the intake check valve 45 is opened. After the cleaning is completed, the limiting rod 31 is moved from the cleaning section 4432. 2 moves to the reset section 4433, at which time the brush 441 is away from the surface of the filter plate 451, and the shielding portion 444 is also away from one end of the intake check valve 45, and then the limiting rod 31 slides in the reset section 4433, at which time the piston plate 44 sucks the gas into the sealing shell 4 through the filter plate 451 through the intake check valve 45, and when the limiting rod 31 moves from the reset section 4433 to the rotating section 4434, the brush 441 is reset to clean the filter plate 451 again, and the shielding portion 444 shields the lower part of the intake check valve 45; After the motor stops working, the electromagnetic plate 23 is powered off, so that the first spring 233 drives the magnetic rod 232 to move away from one side of the protrusion 442. At this time, the magnetic rod 232 releases the limit on the protrusion 442, so that the piston plate 44 is pulled by the elastic telescopic rod 47, and the elastic telescopic rod 47 can drive the piston plate 44 to move toward the second adsorption cotton pad 41. At this time, the limit rod 31 is at the junction of the rotating section 4434 and the moving section 4431, and the piston plate 44 is in the initial position. At this time, the exhaust check valve 46 is closed, and the rotation of the piston plate 44 drives its shielding part 444 to rotate synchronously, so that the shielding part 444 blocks the bottom of the intake check valve 45.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes to a waterproof plastic-sealed DC motor and its inventive concept according to the technology of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waterproof plastic-encapsulated DC motor, comprising a plastic-encapsulated shell (1), a stator (11) being fixedly arranged inside the plastic-encapsulated shell (1), a plastic-encapsulated cover (3) being fixedly connected to one end of the plastic-encapsulated shell (1), a rotor (2) being rotatably arranged inside the plastic-encapsulated cover (3), characterized in that: One end of the plastic sealing cover (3) is fixedly connected to a sealing shell (4), a second adsorption cotton pad (41) is fixedly arranged inside the sealing shell (4), a piston plate (44) is slidably connected inside the sealing shell (4), an exhaust frame (462) is fixedly connected to the outer wall of the plastic sealing shell (1), a plurality of exhaust holes (463) are arranged on the outer wall of the exhaust frame (462), and an exhaust pipe (461) is fixedly connected between the sealing shell (4) and the exhaust frame (462); The piston plate (44) is driven to slide back and forth inside the sealing shell (4) and squeeze the second adsorption cotton pad (41) so that the liquid droplets adsorbed inside the second adsorption cotton pad (41) are squeezed out. At the same time, when the piston plate (44) reciprocates, the airflow inside the sealing shell (4) can be discharged into the exhaust frame (462) through the exhaust pipe (461). The exhaust frame (462) discharges the airflow through the exhaust hole (463) and blows it toward the surface of the plastic packaging shell (1).

2. A waterproof plastic-sealed DC motor according to claim 1, characterized in that: The rotor (2) comprises a rotating shaft (21), the rotating shaft (21) being rotatably connected to the inside of the plastic cover (3), one end of the rotating shaft (21) being fixedly connected to a reciprocating screw (22), a surface of the reciprocating screw (22) being threadedly connected to an electromagnetic plate (23), and one end of the electromagnetic plate (23) being rotatably connected to one end of a piston plate (44).

3. A waterproof plastic-sealed DC motor according to claim 2, characterized in that: A positioning rod (231) is slidably connected inside the electromagnetic plate (23), and the positioning rod (231) is fixedly connected to one end of the plastic cover (3).

4. A waterproof plastic-sealed DC motor according to claim 3, characterized in that: A drainage one-way valve (43) is fixedly arranged on the outer wall of the sealing shell (4), a sealing ring (42) is fixedly connected to the outer wall of the sealing shell (4), a first adsorption cotton pad (32) is fixedly arranged on one side of the plastic cover (3), and the inner walls of the sealing ring (42), the first adsorption cotton pad (32) and the second adsorption cotton pad (41) are all attached to the outer wall of the rotating shaft (21).

5. A waterproof plastic-sealed DC motor according to claim 4, characterized in that: The outer wall of the plastic package shell (1) is fixedly connected to a plurality of heat conducting plates (12), and the heat conducting plates (12) all penetrate the inner wall of the plastic package shell (1), a plurality of heat dissipation plates (121) are fixedly arranged inside the heat conducting plates (12), the inner wall of the heat dissipation plates (121) is provided with a plurality of heat dissipation holes (122), and sealing strips are provided at the connection points between the plurality of heat conducting plates (12) and the plastic package shell (1).

6. A waterproof plastic-sealed DC motor according to claim 2, characterized in that: The sealed shell (4) comprises an air intake check valve (45) and an exhaust check valve (46), wherein the air intake check valve (45) and the exhaust check valve (46) are both fixedly connected to the outer wall of the sealed shell (4), one end of the air intake check valve (45) is fixedly connected to a filter plate (451), and the exhaust check valve (46) is fixedly connected to one end of an exhaust pipe (461).

7. A waterproof plastic-sealed DC motor according to claim 6, characterized in that: One end of the piston plate (44) is fixedly connected to a protrusion (442); one side of the electromagnetic plate (23) is slidably connected to a magnetic rod (232); a first spring (233) is fixedly connected between the magnetic rod (232) and the electromagnetic plate (23); the piston plate (44) is made of magnetic material; after power is applied, the electromagnetic plate (23) and the piston plate (44) are attracted to each other; one end of the piston plate (44) is fixedly connected to a brush (441); one side of the piston plate (44) is rotatably provided with a connecting block; and an elastic telescopic rod (47) is fixedly connected between the connecting plate and the sealing shell (4).

8. The waterproof plastic-sealed DC motor according to claim 7, characterized in that: A shielding portion (444) is provided on one side of the piston plate (44), a limiting groove (443) is provided on the surface of the piston plate (44), a limiting rod (31) is slidably connected inside the limiting groove (443), and one end of the limiting rod (31) is fixedly connected to one end of the plastic cover (3).

9. The waterproof plastic-sealed DC motor according to claim 8, characterized in that: The limiting groove (443) comprises a moving section (4431), a cleaning section (4432) is arranged on one side of the moving section (4431), a reset section (4433) is arranged at one end of the cleaning section (4432), a rotating section (4434) is arranged on one side of the reset section (4433), and the moving section (4431), the cleaning section (4432), the reset section (4433) and the rotating section (4434) are connected.

10. The waterproof plastic-sealed DC motor according to claim 9, characterized in that: The depth of the moving section (4431) is greater than the depth of the resetting section (4433), and the depth of the resetting section (4433) is greater than the depth of the cleaning section (4432).

Images