Permanent magnet synchronous motor with overheat protection function

Abstract

The application discloses a permanent magnet synchronous motor with overheating protection function and relates to the technical field of permanent magnet synchronous motors. The permanent magnet synchronous motor comprises a rotating shaft, a rotor, a stator, a heat conduction assembly, an air treatment device, a heat dissipation fan, a heat transmission variable speed assembly, a regenerative tube and a motor shell. The heat absorbed by the heat conduction shell is transmitted to the second expansion cavity, so that the medium is expanded and drives the push head to extrude the energy storage spring. The setting of the blocking head enables the energy storage spring to be compressed and store energy. When the critical value is exceeded, the stored energy is released to drive the vibration impact head to rapidly impact on the self processor, so that the dust on the filter screen is vibrated and falls. The vibrated and fallen dust is gathered and concentrated at the bottom of the front end shell, so that the heat of the motor is converted into mechanical energy, and the purpose of self processing and cleaning of the filter screen is achieved. The filter screen and the water absorption cotton are used to achieve the purpose of processing air, prevent dust from polluting the interior of the motor and prevent moisture from causing corrosion in the interior of the motor.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of permanent magnet synchronous motors, and particularly relates to a permanent magnet synchronous motor with an overheating protection function. BACKGROUND

[0002] The permanent magnet synchronous motor realizes high efficiency, high power density and precise control by virtue of permanent magnet excitation, and becomes the core of modern energy and driving technology. It improves the endurance mileage in the field of electric vehicles, reduces energy consumption in the industrial field, optimizes energy conversion in the renewable energy system, and reduces the life cycle cost through the brushless design and low maintenance requirement. Compared with traditional motors, it has energy-saving advantages and dynamic performance, and supports intelligent manufacturing and green transformation.

[0003] However, although the existing permanent magnet synchronous motor is provided with a heat dissipation fan and a filtering system, the heat dissipation fan is directly installed on the rotating shaft in the form of arrangement, so that the heat dissipation fan continuously consumes the kinetic energy output of the motor, which is not conducive to energy saving. In addition, when the filter screen is blocked, the heat dissipation effect is reduced, and professional maintenance personnel need to maintain regularly, which is high in labor cost. In addition, when the humidity in the air is high, a water absorption layer is additionally arranged, but when the air humidity is high and the water absorption layer is saturated, the wet air still enters the motor, causing corrosion of the motor. SUMMARY

[0004] The application aims to provide a permanent magnet synchronous motor with an overheating protection function to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the application provides the following technical scheme: a permanent magnet synchronous motor with an overheating protection function, comprising a motor shell, a rotating shaft rotatably installed in the motor shell, a rotor installed on the rotating shaft, a stator installed in the motor shell, a rear end shell arranged at one end of the motor shell, an end ring installed at the other end of the motor shell, a front end shell installed on the end ring, a rotating connecting rod installed on the rear end shell, a heat dissipation fan rotatably installed on the rotating connecting rod, an air treatment device installed in the front end shell, a plurality of heat recovery pipes installed on the motor shell, one end of each heat recovery pipe being connected with the rear end shell, the other end of each heat recovery pipe penetrating through the front end shell and being connected with the air treatment device, a fixed connecting rod installed in the motor shell, a heat transmission variable speed assembly rotatably installed on the fixed connecting rod, a secondary shaft installed on the rotating shaft, a transmission wheel installed on the secondary shaft, the transmission wheel being in transmission with the heat transmission variable speed assembly, the heat transmission variable speed assembly being in transmission connection with the heat dissipation fan, and a plurality of heat conduction assemblies installed in the motor shell, one end of each heat conduction assembly being connected with the heat transmission variable speed assembly through a pipeline.

[0006] The transmission wheel is fixedly connected with the secondary shaft. The permanent magnet synchronous motor is externally connected with an electric control system, and the electric control system is used for controlling the operation of the whole permanent magnet synchronous motor.

[0007] During operation, the electronic control system supplies power to the stator, which drives the rotor to rotate around the rotating shaft, the rotating shaft drives the countershaft to rotate, and the countershaft drives the transmission wheel to rotate.

[0008] Furthermore, the heat conduction component includes a heat conduction shell, which is installed in the motor shell, a first slide rod is slidably installed in the heat conduction shell, a first expansion chamber is provided in the heat conduction shell, a first slide plug is installed at one end of the first slide rod, the first slide plug is slidably installed in the first expansion chamber, a second slide plug is installed at the other end of the first slide rod, an extrusion chamber is provided in the heat conduction shell, the second slide plug is located in the extrusion chamber, the extrusion chamber is connected to the heat transmission speed change assembly through a pipeline, the first expansion chamber is filled with a medium with a high thermal expansion coefficient, and the extrusion chamber is filled with hydraulic oil.

[0009] The heat-conducting shell is close to the stator and is used to absorb and conduct heat inside the motor.

[0010] When a motor runs for extended periods, its internal temperature rises. This heat transfers significantly to the heat-conducting housing, causing the medium in the first expansion chamber of the housing to expand due to the heat. This expanded medium pushes the first slide to move, which, via the first slide rod, pushes the second slide to slide within the extrusion chamber. The hydraulic oil in the extrusion chamber is pressurized and then fed through a pipeline to the fixed housing. It then enters the infusion chamber through the infusion port and finally enters the hydraulic chamber. As the hydraulic oil in the hydraulic chamber increases, the piston rod is compressed, squeezing the telescopic spring. At this point, the piston rod corresponding to the telescopic spring with the smallest elastic coefficient is the first to extend out of the multi-angle rotating housing, compressing this spring. Subsequently, as the motor temperature continues to rise, the heat-conducting housing continues to absorb heat, causing the remaining piston rods to extend one by one as the elastic coefficients of their corresponding telescopic springs increase.

[0011] The first piston rod to extend drives the curved transmission plate into contact with the rotating transmission wheel. The transmission wheel then rotates the curved transmission plate through friction, which in turn drives the entire heat transmission speed change assembly. As the curved transmission plate moves away from the transmission wheel, its speed gradually decreases. As it reaches the cooling fan, it transfers kinetic energy, causing the cooling fan to rotate. Afterwards, it contacts the transmission wheel again, and the cycle repeats. As the temperature inside the motor increases, more piston rods extend, more curved transmission plates come into contact with the transmission wheel, more kinetic energy is transferred to the cooling fan, and the cooling fan speed increases.

[0012] When the motor runs for a short time, the internal temperature of the motor is low. At this time, the heat transferred to the heat-conducting shell is small, the expansion degree of the medium in the first expansion chamber is small, the arc-shaped transmission plate does not contact the transmission wheel, the transmission wheel idles, and there is no loss to the motor output.

[0013] When the cooling fan rotates, external air enters through the air inlet, passes through the air treatment device, and then passes through the inside of the motor, taking away the heat inside the motor. After that, the hot air is discharged from the air outlet, thereby dissipating the heat inside the motor and achieving the purpose of overheating protection; and the speed of the cooling fan changes with the heating conditions inside the motor. The higher the temperature, the faster the speed, so that the motor can adjust the speed of the cooling fan automatically according to different heat, reducing the loss of motor output and achieving the purpose of variable speed and temperature control of the cooling fan.

[0014] Furthermore, the heat-conducting component also includes a second slide rod, which is slidably installed in the heat-conducting shell, and a second expansion chamber is provided in the heat-conducting shell. A third slide plug is provided at one end of the second slide rod, and the third slide plug is slidably installed in the second expansion chamber. A push head is installed at the other end of the second slide rod, and an energy storage spring is installed on the push head. A vibrating head is installed at one end of the energy storage spring, and the vibrating head is slidably connected to the motor shell. The second expansion chamber is filled with a medium with a high thermal expansion coefficient.

[0015] The first expansion chamber and the second expansion chamber are partitioned.

[0016] When the heat-conducting shell absorbs heat, part of the heat is transferred to the second expansion chamber. The medium in the second expansion chamber expands due to the heat and squeezes the third piston. The third piston slides in the second expansion chamber, and the third piston drives the push head to squeeze the energy storage spring through the second sliding rod. The vibrating head is blocked by the blocking head and cannot move. The energy storage spring is continuously compressed. When the compression of the energy storage spring exceeds the critical value, the vibrating head lifts the blocking head under the action of the elastic force of the energy storage spring. The blocking head squeezes the blocking spring and moves upward. After the vibrating head loses its blockage, the energy storage spring rebounds and drives the vibrating head to quickly hit the vibrating plate. The vibrating plate transmits the vibration to the hollow tube through the vibration transmission rod. The hollow tube drives the filter to vibrate, so that the dust on the filter is vibrated off. The dust that is shaken off gathers at the bottom of the front shell and is concentrated, thereby converting the heat of the motor into mechanical energy, thereby achieving the purpose of self-cleaning of the filter. When the motor cools down, the push head drives the energy storage spring to retract, and the energy storage spring pulls the vibrating head, so that the vibrating head lifts the blocking head and resets it again.

[0017] Furthermore, the heat conduction component also includes a blocking head, which is slidably installed in the motor housing. The blocking head is located on one side of the vibration head and is in contact with the vibration head. A blocking spring is installed between the blocking head and the motor housing.

[0018] Further, the heat transmission variable speed assembly comprises a fixed shell, the fixed shell is installed on the fixed connecting rod, a multi-angle rotating shell is rotatably installed on the fixed shell, a hydraulic cavity is arranged in the multi-angle rotating shell, a plurality of piston rods are slidably installed in the hydraulic cavity, an arc-shaped transmission plate is installed at one end of the piston rod, the arc-shaped transmission plate is in transmission with the heat dissipation fan and the transmission wheel respectively, an extension spring is installed between the piston rod and the multi-angle rotating shell, the elastic coefficients of the plurality of extension springs are sequentially increased, a liquid conveying cavity is arranged in the fixed shell, the liquid conveying cavity is communicated with the hydraulic cavity, a plurality of liquid conveying holes are arranged on the fixed shell, the plurality of liquid conveying holes are connected with a plurality of extrusion cavities through pipelines, and the hydraulic cavity and the liquid conveying cavity are filled with hydraulic oil.

[0019] Further, the air treatment device comprises a plurality of self-treatment devices and water absorption cotton, the self-treatment devices are installed in the front-end shell, a filter screen is installed between the self-treatment devices, and the water absorption cotton is installed in the front-end shell.

[0020] Further, the self-treatment device comprises a hollow pipe, the hollow pipe is installed in the front-end shell, the filter screen is arranged between the hollow pipes, a heat cavity is arranged in the hollow pipe, a plurality of hot air holes are arranged on the hollow pipe and face the water absorption cotton, the hot air holes are communicated with the heat cavity, a vibration transmission rod is installed on the hollow pipe, and a vibration hitting plate is installed on the vibration transmission rod.

[0021] The position of the vibration hitting plate corresponds to the vibration hitting head.

[0022] When external air passes through the air treatment device, dust in the air is filtered by the filter screen, and moisture in the air is adsorbed by the water absorption cotton, so that the purpose of treating the air is achieved, dust pollution in the motor is prevented, and moisture corrosion in the motor is prevented. When the heat dissipation fan drives hot air to blow out of the air outlet hole, a small part of the hot air flows back to the heat cavity in the hollow pipe through the heat recovery pipe, and then overflows from the hot air hole. The overflowed hot air blows to the water absorption cotton together with the external air, dries the moisture in the water absorption cotton, recycles the heat generated by the motor, and thus achieves the purpose of self-drying of the water absorption cotton, prolongs the service life of the water absorption cotton, and prevents the water absorption cotton from being saturated.

[0023] Further, a plurality of air inlet holes are arranged on the front-end shell, and a plurality of air outlet holes are arranged on the rear-end shell.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] 1. The heat absorbed in the heat conduction shell makes the medium in the first expansion chamber expand, and the extension spring with the increasing elastic coefficient is arranged, so that the heat transmission variable speed assembly realizes the purpose of variable speed adjustment of the heat dissipation fan.

[0026] 2. The heat absorbed by the heat-conducting shell is transferred to the second expansion chamber, causing the medium to expand and drive the push head to squeeze the energy storage spring. Through the setting of the blocking head, the energy storage spring is compressed and stored. When it exceeds the critical value, the stored energy is released, driving the vibration head to quickly hit the self-processor, so that the dust on the filter is shaken off. The shaken dust gathers at the bottom of the front shell and is concentrated, thereby converting the heat of the motor into mechanical energy, achieving the purpose of self-processing and cleaning of the filter.

[0027] 3. By setting up the heat recovery pipe, a small part of the hot air in the motor is blown straight into the hollow tube by the cooling fan. The overflowing hot air is blown to the absorbent cotton together with the external air to dry the moisture in the absorbent cotton. The heat generated by the motor is recycled to achieve the purpose of self-drying of the washed cotton, thereby increasing the service life of the washed cotton and preventing the absorbent cotton from being saturated.

[0028] 4. When the cooling fan rotates, external air enters from the air inlet, passes through the air handling device, and then passes through the inside of the motor, taking away the heat inside the motor. After that, the hot air is discharged from the air outlet, thereby dissipating the heat inside the motor and achieving the purpose of overheating protection.

[0029] 5. Use filters and absorbent cotton to treat the air, prevent dust from polluting the inside of the motor, and prevent moisture from causing internal corrosion of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an overall three-dimensional diagram of the permanent magnet synchronous motor of the present invention;

[0031] Figure 2 The three-dimensional permanent magnet synchronous motor of the present invention Figure 1 ;

[0032] Figure 3 The three-dimensional permanent magnet synchronous motor of the present invention Figure 2 ;

[0033] Figure 4 For the present invention Figure 3 A partial enlarged view of area A in the middle;

[0034] Figure 5 For the present invention Figure 3 A partial enlarged view of the middle B area;

[0035] Figure 6 The three-dimensional thermal transmission speed change component of the present invention Figure 1 ;

[0036] Figure 7 The three-dimensional thermal transmission speed change component of the present invention Figure 2 ;

[0037] Figure 8is a perspective view of an air treatment device according to the present invention;

[0038] Figure 9 It is a three-dimensional diagram of the self-processor of the present invention.

[0039] In the figure: 1. rotating shaft; 2. rotor; 3. stator; 4. heat conduction assembly; 5. air handling device; 6. cooling fan; 7. heat transmission speed change assembly; 8. heat return pipe; 9. motor housing; 91. front end housing; 92. rear end housing; 93. end ring; 911. air inlet; 921. air outlet; 11. countershaft; 12. transmission wheel; 61. rotating connecting rod; 71. fixed connecting rod; 72. fixed housing; 73. polygonal rotating housing; 74. telescopic spring; 75. arc-shaped transmission plate; 76. piston rod; 721. infusion hole; 722. infusion cavity ;731, hydraulic chamber; 51, self-processing unit; 52, filter screen; 53, absorbent cotton; 511, hollow tube; 512, hot chamber; 513, hot air hole; 514, vibration transmission rod; 515, vibration plate; 41, heat-conducting shell; 42, first sliding rod; 43, first sliding plug; 44, second sliding plug; 45, second sliding rod; 46, third sliding plug; 47, pushing head; 48, energy storage spring; 49, vibration head; 410, blocking head; 411, first expansion chamber; 412, extrusion chamber; 413, second expansion chamber; 4101, blocking spring. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0041] like Figures 1-9As shown, the present invention provides a technical solution for a permanent magnet synchronous motor with an overheating protection function: comprising a motor housing 9, a rotating shaft 1 is rotatably installed in the motor housing 9, a rotor 2 is installed on the rotating shaft 1, a stator 3 is installed in the motor housing 9, a rear end housing 92 is provided at one end of the motor housing 9, an end ring 93 is installed at the other end of the motor housing 9, a front end housing 91 is installed on the end ring 93, a rotating connecting rod 61 is installed on the rear end housing 92, a cooling fan 6 is rotatably installed on the rotating connecting rod 61, an air handling device 5 is installed in the front end housing 91, and a plurality of heat recovery pipes are installed on the motor housing 9. 8. One end of the heat return pipe 8 is connected to the rear end shell 92, and the other end of the heat return pipe 8 passes through the front end shell 91 and is connected to the air handling device 5. A fixed connecting rod 71 is installed in the motor housing 9, and a heat transmission speed change component 7 is rotatably installed on the fixed connecting rod 71. A countershaft 11 is installed on the rotating shaft 1, and a transmission wheel 12 is installed on the countershaft 11. The transmission is transmitted between the transmission wheel 12 and the heat transmission speed change component 7. The heat transmission speed change component 7 is connected to the cooling fan 6. A plurality of heat conduction components 4 are installed in the motor housing 9, and one end of the heat conduction component 4 is connected to the heat transmission speed change component 7 through a pipeline.

[0042] The transmission wheel 12 is fixedly connected to the secondary shaft 11. The permanent magnet synchronous motor is externally connected to an electronic control system, which is used to control the operation of the entire permanent magnet synchronous motor.

[0043] The heat conduction assembly 4 includes a heat conducting shell 41 mounted within the motor housing 9. A first slide rod 42 is slidably mounted within the heat conducting shell 41. A first expansion chamber 411 is defined within the heat conducting shell 41. A first slide plug 43 is mounted at one end of the first slide rod 42. The first slide plug 43 slides within the first expansion chamber 411. A second slide plug 44 is mounted at the other end of the first slide rod 42. An extrusion chamber 412 is defined within the heat conducting shell 41. The second slide plug 44 is located within the extrusion chamber 412. The extrusion chamber 412 is connected to the thermal transmission speed change assembly 7 via a pipe. The first expansion chamber 411 is filled with a medium with a high thermal expansion coefficient, and the extrusion chamber 412 is filled with hydraulic oil. The heat conducting shell 41 is located near the stator 3 and is used to absorb and conduct heat from within the motor.

[0044] The heat conduction assembly 4 also includes a second slide rod 45, which is slidably mounted within the heat conduction housing 41. The heat conduction housing 41 has a second expansion chamber 413. A third slide plug 46 is mounted at one end of the second slide rod 45. The third slide plug 46 is slidably mounted within the second expansion chamber 413. A pusher head 47 is mounted at the other end of the second slide rod 45. An energy storage spring 48 is mounted on the pusher head 47. A vibrating head 49 is mounted at one end of the energy storage spring 48. The vibrating head 49 is slidably connected to the motor housing 9. The second expansion chamber 413 is filled with a medium with a high thermal expansion coefficient. The first expansion chamber 411 and the second expansion chamber 413 are separated.

[0045] The thermal conductive component 4 also includes a blocking head 410, which is slidably installed in the motor housing 9. The blocking head 410 is located on one side of the vibrating head 49, and is in contact with the vibrating head 49. A blocking spring 4101 is installed between the blocking head 410 and the motor housing 9.

[0046] The thermal transmission speed change assembly 7 includes a fixed shell 72, which is mounted on the fixed connecting rod 71. A polygonal rotating shell 73 is rotatably mounted on the fixed shell 72. A hydraulic chamber 731 is provided in the polygonal rotating shell 73. Several piston rods 76 are slidably mounted in the hydraulic chamber 731. An arc-shaped transmission plate 75 is mounted at one end of the piston rod 76. The arc-shaped transmission plate 75 is respectively transmitted to the cooling fan 6 and the transmission wheel 12. A telescopic spring 74 is installed between the piston rod 76 and the polygonal rotating shell 73. The elastic coefficients of the several telescopic springs 74 increase successively. An infusion chamber 722 is provided in the fixed shell 72. The infusion chamber 722 is connected to the hydraulic chamber 731. Several infusion holes 721 are provided on the fixed shell 72. Several infusion holes 721 are connected to several extrusion chambers 412 through pipes. Both the hydraulic chamber 731 and the infusion chamber 722 are filled with hydraulic oil.

[0047] The air treatment device 5 includes several self-processors 51 and absorbent cotton 53. The self-processors 51 are installed in the front shell 91. Filters 52 are installed between the self-processors 51. The absorbent cotton 53 is installed in the front shell 91. The self-processors 51 are connected to the heat return pipe 8.

[0048] The self-processor 51 includes a hollow tube 511, which is installed in the front end shell 91. A filter 52 is provided between the hollow tubes 511. A heat chamber 512 is provided in the hollow tube 511. The hollow tube 511 is provided with a plurality of hot air holes 513 with openings facing the absorbent cotton 53. The hot air holes 513 are connected to the heat chamber 512. A vibration rod 514 is installed on the hollow tube 511, and a vibration plate 515 is installed on the vibration rod 514. The vibration plate 515 is located corresponding to the vibration head 49.

[0049] The front end shell 91 is provided with a plurality of air inlet holes 911 , and the rear end shell 92 is provided with a plurality of air outlet holes 921 .

[0050] The working principle of the present invention is as follows: During operation, the electronic control system supplies power to the stator 3, which drives the rotor 2 to rotate about the rotating shaft 1. The rotating shaft 1 drives the secondary shaft 11 to rotate, and the secondary shaft 11 drives the transmission wheel 12 to rotate. When the motor runs for a long time, the internal temperature of the motor rises. At this time, a large amount of heat is transferred to the heat-conducting shell 41. The medium in the first expansion chamber 411 of the heat-conducting shell 41 expands due to the heat. The expanded medium pushes the first slide 43 to move. The first slide 43 pushes the second slide 44 to slide in the extrusion chamber 412 via the first slide rod 42. The hydraulic oil in the extrusion chamber 412 is pressurized and then input into the fixed shell 72 through the pipeline. Then, it enters the infusion chamber 722 through the infusion hole 721, and finally enters the hydraulic chamber 731 through the infusion chamber 722. As the hydraulic oil in the hydraulic chamber 731 increases, the piston rod 76 is pressurized and squeezes the telescopic spring 74. At this time, the piston rod 76 corresponding to the telescopic spring 74 with the smallest elastic coefficient is the first to extend out of the polygonal rotating shell 73, and the telescopic spring 74 is also compressed first. Afterwards, as the temperature of the motor continues to rise, the heat-conducting shell 41 continues to absorb heat, and the remaining piston rods 76 are extended one by one as the elastic coefficient of the corresponding telescopic spring 74 increases.

[0051] The first piston rod 76 to extend drives the curved transmission plate 75 into contact with the rotating transmission wheel 12. The transmission wheel 12 then rotates the curved transmission plate 75 through friction, which in turn drives the entire thermal transmission speed change assembly 7 to rotate. After the curved transmission plate 75 rotates away from the transmission wheel 12, its speed gradually decreases. When it reaches the cooling fan 6, it transfers kinetic energy, causing the cooling fan 6 to rotate. Afterwards, it contacts the transmission wheel 12 again, and the cycle repeats. As the temperature inside the motor increases, more piston rods 76 extend, and more curved transmission plates 75 contact the transmission wheel 12. This, in turn, transfers more kinetic energy to the cooling fan 6, causing the cooling fan 6 to rotate faster.

[0052] When the motor runs for a short time, the internal temperature of the motor is low. At this time, the heat transferred to the heat-conducting shell 41 is small, the expansion degree of the medium in the first expansion chamber 411 is small, the arc-shaped transmission plate 75 does not contact the transmission wheel 12, the transmission wheel 12 idles, and there is no loss to the motor output.

[0053] When the cooling fan 6 rotates, external air enters through the air inlet 911, passes through the air treatment device 5, and then passes through the inside of the motor to take away the heat inside the motor. After that, the hot air is discharged from the air outlet 921, thereby dissipating the heat inside the motor and achieving the purpose of overheating protection; and the speed of the cooling fan 6 changes with the heating conditions inside the motor. The higher the temperature, the faster the speed, so that the motor can adjust the speed of the cooling fan 6 according to different heat, thereby reducing the loss of the motor output and achieving the purpose of variable speed temperature control of the cooling fan 6.

[0054] When external air passes through the air handling device 5, dust in the air is filtered by the filter 52, and moisture in the air is absorbed by the absorbent cotton 53, thereby achieving the purpose of air treatment, preventing dust from contaminating the interior of the motor and preventing moisture from causing internal corrosion of the motor. When the heat dissipation fan 6 drives the hot air to be blown out from the air outlet 921, a small portion of the hot air will flow back into the heat chamber 512 in the hollow tube 511 along the heat return pipe 8, and then overflow from the hot air hole 513. The overflowed hot air is blown toward the absorbent cotton 53 along with the external air, drying the moisture in the absorbent cotton 53 and recycling the heat generated by the motor, thereby achieving the purpose of self-drying the washing cotton, extending the service life of the washing cotton, and preventing the absorbent cotton 53 from saturation.

[0055] When the heat-conducting shell 41 absorbs heat, part of the heat is transferred to the second expansion chamber 413. The medium in the second expansion chamber 413 expands due to the heat and squeezes the third piston. The third piston slides in the second expansion chamber 413. The third piston drives the push head 47 to squeeze the energy storage spring 48 through the second slide rod 45. The vibration head 49 is blocked by the blocking head 410 and cannot move. The energy storage spring 48 is continuously compressed. When the compression amount of the energy storage spring 48 exceeds the critical value, the vibration head 49 pushes up the blocking head 410 under the elastic force of the energy storage spring 48. The blocking head 410 squeezes the blocking spring 4101 and moves upward, vibrating. After the head 49 loses its obstruction, the energy storage spring 48 rebounds and drives the vibration head 49 to quickly hit the vibration plate 515. The vibration plate 515 transmits the vibration to the hollow tube 511 through the vibration transmission rod 514. The hollow tube 511 drives the filter 52 to vibrate, so that the dust on the filter 52 is shaken off. The shaken dust gathers at the bottom of the front end shell 91 and is concentrated, thereby converting the heat of the motor into mechanical energy, achieving the purpose of self-processing and cleaning of the filter 52; when the motor cools down, the push head 47 drives the energy storage spring 48 to retract, and the energy storage spring 48 pulls the vibration head 49, so that the vibration head 49 lifts up and resets the blocking head 410 again.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A permanent magnet synchronous motor with overheat protection function, characterized in that: The permanent magnet synchronous motor comprises a motor housing (9), a rotating shaft (1) is rotatably mounted in the motor housing (9), a rotor (2) is mounted on the rotating shaft (1), a stator (3) is mounted in the motor housing (9), a rear end housing (92) is provided at one end of the motor housing (9), an end ring (93) is mounted at the other end of the motor housing (9), a front end housing (91) is mounted on the end ring (93), a rotating connecting rod (61) is mounted on the rear end housing (92), a cooling fan (6) is rotatably mounted on the rotating connecting rod (61), an air handling device (5) is mounted in the front end housing (91), a plurality of heat recovery pipes (8) are mounted on the motor housing (9), and the heat recovery pipes (8) are arranged on the motor housing (9). The motor housing (9) is connected to the rear end housing (92), the other end of the heat return pipe (8) passes through the front end housing (91) and is connected to the air handling device (5), a fixed connecting rod (71) is installed in the motor housing (9), a heat transmission speed change component (7) is rotatably installed on the fixed connecting rod (71), a secondary shaft (11) is installed on the secondary shaft (11), a transmission wheel (12) is installed on the transmission wheel (12) and the heat transmission speed change component (7), the heat transmission speed change component (7) is connected to the cooling fan (6), a plurality of heat conduction components (4) are installed in the motor housing (9), one end of the heat conduction component (4) is connected to the heat transmission speed change component (7) through a pipeline; The heat-conducting assembly (4) includes a heat-conducting shell (41), which is installed in the motor housing (9). A first slide rod (42) is slidably installed in the heat-conducting shell (41), and a first expansion chamber (411) is provided in the heat-conducting shell (41). A first slide plug (43) is installed at one end of the first slide rod (42), and the first slide plug (43) is slidably installed in the first expansion chamber (411). A second slide plug (44) is installed at the other end of the first slide rod (42). An extrusion chamber (412) is provided in the heat-conducting shell (41), and the second slide plug (44) is located in the extrusion chamber (412). The extrusion chamber (412) is connected to the heat transmission speed change assembly (7) through a pipeline. The first expansion chamber (411) is filled with a medium with a high thermal expansion coefficient, and the extrusion chamber (412) is filled with hydraulic oil.

2. The permanent magnet synchronous motor with overheat protection function according to claim 1, characterized in that: The heat-conducting assembly (4) further includes a second slide bar (45), which is slidably mounted in the heat-conducting shell (41), and a second expansion chamber (413) is provided in the heat-conducting shell (41). A third slide plug (46) is provided at one end of the second slide bar (45), and the third slide plug (46) is slidably mounted in the second expansion chamber (413). A push head (47) is mounted at the other end of the second slide bar (45), and an energy storage spring (48) is mounted on the push head (47). A vibrating head (49) is mounted at one end of the energy storage spring (48), and the vibrating head (49) is slidably connected to the motor housing (9). The second expansion chamber (413) is filled with a medium with a high thermal expansion coefficient.

3. The permanent magnet synchronous motor with overheat protection function according to claim 2, characterized in that: The heat conduction component (4) further comprises a blocking head (410), wherein the blocking head (410) is slidably mounted in the motor housing (9), the blocking head (410) is located on one side of the vibrating head (49), the blocking head (410) is in contact with the vibrating head (49), and a blocking spring (4101) is mounted between the blocking head (410) and the motor housing (9).

4. The permanent magnet synchronous motor with overheat protection function according to claim 1, characterized in that: The heat transmission speed change assembly (7) includes a fixed shell (72), the fixed shell (72) is mounted on a fixed connecting rod (71), a polygonal rotating shell (73) is rotatably mounted on the fixed shell (72), a hydraulic chamber (731) is provided in the polygonal rotating shell (73), a plurality of piston rods (76) are slidably mounted in the hydraulic chamber (731), an arc-shaped transmission plate (75) is mounted at one end of the piston rod (76), the arc-shaped transmission plate (75) is respectively connected to the cooling fan (6) and the transmission wheel (12), and the A telescopic spring (74) is installed between the piston rod (76) and the polygonal rotating shell (73), and the elastic coefficients of the plurality of telescopic springs (74) increase in sequence. An infusion cavity (722) is provided in the fixed shell (72), and the infusion cavity (722) is communicated with the hydraulic cavity (731). The fixed shell (72) is provided with a plurality of infusion holes (721), and the plurality of infusion holes (721) are connected to the plurality of extrusion cavities (412) through pipelines. The hydraulic cavity (731) and the infusion cavity (722) are both filled with hydraulic oil.

5. The permanent magnet synchronous motor with overheat protection function according to claim 1, characterized in that: The air treatment device (5) includes a plurality of self-processors (51) and absorbent cotton (53), wherein the self-processors (51) are installed in a front end shell (91), a filter (52) is installed between the self-processors (51), the absorbent cotton (53) is installed in the front end shell (91), and the self-processors (51) are connected to the heat return pipe (8).

6. The permanent magnet synchronous motor with overheat protection function according to claim 5, characterized in that: The self-processor (51) includes a hollow tube (511), the hollow tube (511) is installed in the front end shell (91), a filter (52) is provided between the hollow tubes (511), a heat chamber (512) is provided in the hollow tube (511), a plurality of heat holes (513) with openings facing the water-absorbing cotton (53) are provided on the hollow tube (511), the heat holes (513) are connected to the heat chamber (512), a vibration rod (514) is installed on the hollow tube (511), and a vibration plate (515) is installed on the vibration rod (514).

7. The permanent magnet synchronous motor with overheat protection function according to claim 1, characterized in that: The front end shell (91) is provided with a plurality of air inlet holes (911), and the rear end shell (92) is provided with a plurality of air outlet holes (921).

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