Axial flow fan blade permanent magnet motor rotor

Abstract

The present invention belongs to the technical field of permanent magnet motors, and specifically is an axial flow fan blade permanent magnet motor rotor, comprising a motor shaft rotatably connected inside a motor housing, an iron core fixed to the outside of the motor shaft, the iron core arranged inside the motor housing, a slot body provided on the outside of the iron core, a permanent magnet fixed inside the slot body, a first fan blade fixed to one end of the motor shaft, the first fan blade arranged inside the motor housing, a plurality of heat dissipation channels provided at equal intervals inside the iron core, a plurality of circulation channels provided at equal intervals on one side of the heat dissipation channel, the circulation channel being arranged between two adjacent permanent magnets, and a plurality of air outlets provided at one end of the motor housing away from the first fan blade; the on-off of the end of the heat dissipation channel can be switched by rotating a first baffle inside the heat dissipation channel, and at the same time, the first baffle drives a second baffle to rotate to control the on-off of the circulation channel, and the internal air can be circulated by controlling the on-off during the preheating process of the motor, so as to achieve faster preheating.

Description

Technical Field

[0001] The invention belongs to the technical field of permanent magnet motors, in particular to an axial flow fan blade permanent magnet motor rotor. Background Art

[0002] A permanent magnet motor is an electric motor that uses permanent magnets to generate the motor's magnetic field. It has the advantages of simple structure and high efficiency. The permanent magnet motor consists of a stator and a rotor. During the rotation of the rotor, it will generate heat due to electricity consumption. The heat will affect the magnetism of the permanent magnet, causing instability during the use of the permanent magnet motor. Therefore, fan blades are installed at the end of the shaft to dissipate heat from the motor.

[0003] An existing patent application with publication number CN107425629A discloses a permanent magnet motor rotor, which includes an alternating-pole permanent magnet motor rotor core, two conventional permanent magnet motor rotor cores and tile-type permanent magnets.

[0004] The above-mentioned technical solution will rotate during use, but in a low temperature environment, the temperature of the surface and interior of the starting motor rotor is low. At this time, the lubricating medium at the connection between the rotor and the casing is in a viscous or solidified state. At this time, the friction between the medium and the rotating shaft increases, which makes the lubrication effect worse, and easily causes wear on the rotating shaft of the rotor, affecting the service life of the permanent magnet motor.

[0005] To this end, the present invention provides an axial flow fan blade permanent magnet motor rotor. Summary of the invention

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the axial-flow fan blade permanent magnet motor rotor described in the present invention includes a motor shaft rotatably connected to the inside of a motor housing, an iron core is fixed to the outside of the motor shaft, the iron core is arranged inside the motor housing, a slot body is opened outside the iron core, a permanent magnet is fixed inside the slot body, a first fan blade is fixed to one end of the motor shaft, the first fan blade is arranged inside the motor housing, a plurality of heat dissipation channels are opened at equal intervals inside the iron core, a plurality of circulation channels are opened at equal intervals on one side of the heat dissipation channel, the circulation channel is arranged between two adjacent permanent magnets, and a plurality of air outlets are opened at one end of the motor housing away from the first fan blade.

[0008] Preferably, a first baffle is rotatably connected to one end of the heat dissipation channel away from the first fan blade, and a second baffle is rotatably connected to one end of the circulation channel away from the heat dissipation channel.

[0009] Preferably, the second baffles are connected by a connecting rod, which is rotatably connected to the inside of the iron core. The top of the first baffle is fixed with a first gear through a rotating shaft, and both ends of the connecting rod are fixed with a second gear. The second gear close to one end of the first gear is meshingly connected with the first gear.

[0010] Preferably, a first gear is fixed to the bottom end of the first baffle, a telescopic tooth plate is meshedly connected to one side of the first gear, a telescopic hole is opened inside the iron core, and the telescopic tooth plate forms a telescopic structure in the telescopic hole.

[0011] Preferably, an outer sleeve of the motor shaft is provided with an air collecting hood, which is arranged at the end of the motor housing away from the first fan blade. Both sides of the air collecting hood are fixedly connected to the inner wall of the motor housing through support columns. One end of the air collecting hood opening is close to the end of the heat dissipation channel away from the first fan blade. A plurality of air outlet pipes are fixed at equal intervals on the end of the air collecting hood away from the iron core. The end of the air outlet pipe away from the air collecting hood is connected to the air outlet hole of the motor housing, and the air outlet pipe is connected to the interior of the air collecting hood.

[0012] Preferably, a slide rail is provided on one side of the air collecting hood close to the iron core, a temperature sensor is provided inside the air collecting hood, and a plurality of electric telescopic rods are fixed at equal intervals between the slide rail and the air collecting hood.

[0013] Preferably, a sliding plate is fixed to one end of the telescopic tooth plate away from the first gear, and ball bearings are rotatably connected to both sides of the sliding plate. A sliding groove is provided on the outer side of the slide rail, and the bottom end of the sliding plate is slidably connected to the inside of the sliding groove of the slide rail, and the ball bearings on both sides of the sliding plate are tightly attached to the inner wall of the sliding groove of the slide rail.

[0014] Preferably, a plurality of support rods are fixed at equal intervals on the outer side of one end of the motor shaft close to the first fan blade, a second fan blade is rotatably connected to one side of the support rod close to the heat dissipation channel, and an end of the second fan blade away from the support rod extends to the inside of the heat dissipation channel.

[0015] Preferably, a first transmission gear plate is fixed to an end of the second fan blade away from the heat dissipation channel, a movable hole is opened at the top end of the support rod, a moving rod is slidably connected to the inside of the movable hole, and an end of the moving rod close to the first transmission gear plate is rotatably connected to the second transmission gear plate, and the second transmission gear plate can be meshed and connected with the first transmission gear plate, and a support ring is provided on the outside of the motor shaft close to the end of the first fan blade, the support ring is provided between the iron core and the first fan blade, the outer side of the support ring is fixedly connected to the inner wall of the motor housing through a connecting plate, and a gear ring is fixed to the inside of the support ring, and the second transmission gear plate can be meshed and connected with the gear ring.

[0016] Preferably, a spring is provided on the outer sleeve of the moving rod, one end of the spring is fixedly connected to the moving rod, and the other end of the spring is fixedly connected to a side of the inner wall of the movable hole. A wire take-up drum is provided at the end of the connecting rod away from the first baffle, and a second gear disk is fixed to the top of the wire take-up drum through a rotating shaft. The second gear disk is meshed with a second gear at one end of the connecting rod close to the wire take-up drum, and a pull rope is wound around the outer side of the wire take-up drum, and the other end of the pull rope is fixedly connected to the moving rod.

[0017] The beneficial effects of the present invention are as follows: 1. The axial-flow fan blade permanent magnet motor rotor described in the present invention can switch the on and off of the end of the heat dissipation channel by rotating the first baffle inside the heat dissipation channel. At the same time, the first baffle drives the second baffle to rotate to control the on and off of the circulation channel. During the motor preheating process, the internal air can be controlled to be on and off to achieve faster preheating.

[0018] 2. The axial-flow fan blade permanent magnet motor rotor described in the present invention can blow more air into the heat dissipation channel through the rotation of the second fan blade. More airflow can make the air in the heat dissipation channel circulate faster, which is more convenient for heat dissipation of the iron core. The second fan blade can be started and stopped by controlling the movement of the second transmission gear plate, which is convenient for switching the operating state of the second fan blade under preheating and heat dissipation conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 is a three-dimensional diagram of the motor housing of the present invention; Figure 2 It is a schematic diagram of the internal structure of the motor housing of the present invention; Figure 3 It is a schematic diagram of the structure of the gas collecting hood in the present invention; Figure 4 It is a schematic diagram of the rotating shaft structure in the present invention; Figure 5 It is a schematic diagram of the internal structure of the iron core in the present invention; Figure 6 is a schematic diagram of the structure of the second baffle in the present invention; Figure 7 is a schematic diagram of the first baffle structure in the present invention; Figure 8 is a schematic diagram of the support ring structure in the present invention; Fig. 9 It is a schematic diagram of the internal structure of the support rod in the present invention.

[0021] In the figure: 1. motor housing; 2. motor shaft; 21. iron core; 22. first fan blade; 23. heat dissipation channel; 231. circulation channel; 24. first baffle; 241. first gear plate; 242. first gear; 25. second baffle; 251. connecting rod; 252. second gear; 26. telescopic gear plate; 261. sliding plate; 3. permanent magnet; 4. air collecting cover; 41. air outlet pipe; 42. slide rail; 421. electric telescopic rod; 5. support ring; 51. gear ring; 52. support rod; 521. first transmission gear plate; 522. second fan blade; 523. movable hole; 524. second transmission gear plate; 525. moving rod; 526. spring; 53. take-up reel; 531. pull rope; 532. second gear plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] like Figures 1 to 5 As shown, an axial-flow fan blade permanent magnet motor rotor described in an embodiment of the present invention includes a motor shaft 2 rotatably connected to the inside of a motor housing 1, an iron core 21 is fixed to the outside of the motor shaft 2, the iron core 21 is arranged inside the motor housing 1, a slot body is provided on the outside of the iron core 21, a permanent magnet 3 is fixed inside the slot body, a first blade 22 is fixed to one end of the motor shaft 2, the first blade 22 is arranged inside the motor housing 1, a plurality of heat dissipation channels 23 are provided at equal intervals inside the iron core 21, a plurality of circulation channels 231 are provided at equal intervals on one side of the heat dissipation channel 23, the circulation channel 231 is provided between two adjacent permanent magnets 3, and a plurality of air outlets are provided at one end of the motor housing 1 away from the first blade 22; During the use of the permanent magnet motor, the motor is powered by an external power supply, and the coil inside the motor housing 1 is energized. At this time, the coil generates magnetism, and the permanent magnet 3 and the magnetic action of the coil drive the iron core 21 to rotate, and the iron core 21 drives the motor shaft 2 to rotate. When the temperature is low, the lubricating medium at the connection between the motor shaft 2 and the motor housing 1 is in a viscous or solidified state. At this time, the friction between the rotation of the motor shaft 2 and the motor housing 1 will increase, which will affect the normal rotation of the motor shaft 2 and increase the wear of the motor shaft 2. Therefore, when the motor shaft 2 rotates, the first fan blade 22 rotates along with it, and the airflow generated by the rotation of the first fan blade 22 enters the interior of the heat dissipation channel 23, and the heat dissipation channel is preheated. 23 is blocked at one end away from the first fan blade 22. At this time, the airflow will be ejected to the coil surface through the circulation channel 231, and the airflow can take away the heat from the coil surface. At this time, the airflow with heat will flow inside the motor housing 1, which can speed up the heating speed of the motor housing 1, and can quickly put the lubricating medium in a normal working state under low temperature conditions. When the preheating inside the motor housing 1 is completed, the excess heat needs to be discharged to the outside. Therefore, at this time, the port blocked by the heat dissipation channel 23 is opened, and then the end of the circulation channel 231 away from the heat dissipation channel 23 is blocked. At this time, the airflow generated by the first fan blade 22 will directly pass through the inside of the heat dissipation channel 23, and can directly dissipate the heat to the iron core 21 and the permanent magnet 3, thereby ensuring the stable operation of the rotor.

[0024] like Figures 1 to 6 As shown, the end of the heat dissipation channel 23 away from the first fan blade 22 is rotatably connected to the first baffle 24, and the end of the circulation channel 231 away from the heat dissipation channel 23 is rotatably connected to the second baffle 25; In the initial state, the edge of the first baffle 24 is separated from the inner side of the heat dissipation channel 23, and at this time, the second baffle 25 and the circulation channel 231 are in a sealed state. When it is necessary to block the end of the heat dissipation channel 23 away from the first fan blade 22, the first baffle 24 is rotated 90° to make it contact with the heat dissipation channel 23 to achieve sealing. At the same time, the second baffle 25 will be synchronously rotated 90° to separate the edge of the second baffle 25 from the circulation channel 231. At this time, no air can be discharged from the heat dissipation channel 23, and air can be discharged from the circulation channel 231. After preheating, the iron core 21 and the permanent magnet 3 need to be cooled. At this time, the first baffle 24 is rotated 90° in the opposite direction, and the second baffle 25 is rotated 90° in the opposite direction at the same time. The first baffle 24 can be separated from the inner wall of the heat dissipation channel 23, and the second baffle 25 seals the inner wall of the circulation channel 231. At this time, only the air inside the heat dissipation channel 23 can flow, and the heat dissipation effect is better.

[0025] like Figures 1 to 6As shown, the second baffles 25 are connected by a connecting rod 251, and the connecting rod 251 is rotatably connected to the inside of the iron core 21. The top of the first baffle 24 is fixed with a first toothed disc 241 through a rotating shaft, and both ends of the connecting rod 251 are fixed with a second gear 252, and the second gear 252 near one end of the first toothed disc 241 is meshed and connected with the first toothed disc 241; When the first baffle 24 rotates, the first gear plate 241 is driven to rotate through the rotating shaft, and the first gear plate 241 drives the second gear 252 to rotate. At this time, the second gear 252 drives the connecting rod 251 to rotate. At this time, the connecting rod 251 drives multiple second baffles 25 to rotate, so that the first baffle 24 and the second baffle 25 can be flipped at the same time, which is more convenient to switch the on and off states of the heat dissipation channel 23 and the circulation channel 231.

[0026] like Figures 1 to 7 As shown, a first gear 242 is fixed to the bottom end of the first baffle 24, and a telescopic tooth plate 26 is meshedly connected to one side of the first gear 242. A telescopic hole is opened inside the iron core 21, and the telescopic tooth plate 26 forms a telescopic structure in the telescopic hole; When it is necessary to switch the on / off state of the heat dissipation channel 23 and the circulation channel 231, the telescopic tooth plate 26 is pushed to move in the telescopic hole of the iron core 21. At this time, the telescopic tooth plate 26 engages with the first gear 242 to drive it to rotate. At this time, the first gear 242 can drive the first baffle 24 to rotate.

[0027] like Figures 1 to 3 As shown, an air collecting hood 4 is sleeved on the outside of the motor shaft 2, and the air collecting hood 4 is arranged at one end of the motor housing 1 away from the first fan blade 22. Both sides of the air collecting hood 4 are fixedly connected to the inner wall of the motor housing 1 through support columns. An open end of the air collecting hood 4 is close to an end of the heat dissipation channel 23 away from the first fan blade 22. A plurality of air outlet pipes 41 are fixed at equal intervals on one end of the air collecting hood 4 away from the iron core 21. One end of the air outlet pipe 41 away from the air collecting hood 4 is connected to the air outlet hole of the motor housing 1, and the air outlet pipe 41 is connected to the inside of the air collecting hood 4. During use, the opening of the air collecting hood 4 is aligned with the exhaust end of the heat dissipation channel 23, so that most of the exhaust gas of the heat dissipation channel 23 can enter the interior of the air collecting hood 4, and the gas inside the air collecting hood 4 can be discharged to the exhaust hole of the motor housing 1 through the outlet pipe 41.

[0028] like Figures 1 to 3 As shown, a slide rail 42 is provided on one side of the air collecting hood 4 close to the iron core 21, a temperature sensor is provided inside the air collecting hood 4, and a plurality of electric telescopic rods 421 are fixed at equal intervals between the slide rail 42 and the air collecting hood 4; During use, the temperature sensor inside the air collecting hood 4 will measure the temperature of the gas discharged from the heat dissipation channel 23. When the gas temperature is high, the electric telescopic rod 421 is started to push the slide rail 42, and the slide rail 42 drives the telescopic tooth plate 26 to move. At this time, the first baffle 24 and the second baffle 25 can be rotated. At this time, the end of the circulation channel 231 can be controlled to be closed, and the heat dissipation channel 23 can be opened. At this time, the air inside the heat dissipation channel 23 can flow, and the air in the heat dissipation channel 23 can be discharged to the inside of the air collecting hood 4. During the preheating process, the temperature detected by the temperature sensor is low. At this time, the electric telescopic rod 421 pulls the slide rail 42 to drive the telescopic tooth plate 26, and the telescopic tooth plate 26 drives the first baffle 24 and the second baffle 25 to rotate. At this time, the end of the heat dissipation channel 23 can be closed and the end of the circulation channel 231 can be opened. The switch state inside the heat dissipation channel 23 and the circulation channel 231 can be automatically switched according to the temperature, which is more convenient for heat dissipation and preheating.

[0029] like Figures 1 to 7 As shown, a sliding plate 261 is fixed to one end of the telescopic tooth plate 26 away from the first gear 242, and balls are rotatably connected to both sides of the sliding plate 261. A sliding groove is provided on the outer side of the slide rail 42, and the bottom end of the sliding plate 261 is slidably connected to the inside of the sliding groove of the slide rail 42, and the balls on both sides of the sliding plate 261 are tightly attached to the inner wall of the sliding groove of the slide rail 42; When the slide rail 42 drives the telescopic tooth plate 26 to move, the connection is achieved by sliding the sliding plate 261 in the sliding groove of the slide rail 42. When the motor shaft 2 rotates, it will drive the sliding plate 261 to move. At this time, the sliding plate 261 can slide inside the sliding groove of the slide rail 42, so that the switching of the states of the first baffle 24 and the second baffle 25 will not be affected during the rotation of the motor shaft 2.

[0030] like Figures 5 to 9 As shown, a plurality of support rods 52 are fixed at equal intervals on the outer side of one end of the motor shaft 2 close to the first fan blade 22, and a second fan blade 522 is rotatably connected to one side of the support rod 52 close to the heat dissipation channel 23, and an end of the second fan blade 522 away from the support rod 52 extends to the interior of the heat dissipation channel 23; When the temperature sensor inside the air collecting hood 4 detects a high temperature, the second fan blade 522 rotates. At this time, the second fan blade 522 can blow air into the heat dissipation channel 23. At this time, more airflow can enter the heat dissipation channel 23. The increased airflow accelerates the heat dissipation speed of the iron core 21. In this way, the iron core 21 can dissipate heat faster.

[0031] like Figures 5 to 9As shown, a first transmission toothed disc 521 is fixed to one end of the second blade 522 away from the heat dissipation channel 23, a movable hole 523 is opened at the top end of the support rod 52, a moving rod 525 is slidably connected to the inside of the movable hole 523, and a second transmission toothed disc 524 is rotatably connected to one end of the moving rod 525 close to the first transmission toothed disc 521, and the second transmission toothed disc 524 can be meshed and connected with the first transmission toothed disc 521, and a support ring 5 is arranged on the outside of the motor shaft 2 close to one end of the first blade 22, and the support ring 5 is arranged between the iron core 21 and the first blade 22, and the outer side of the support ring 5 is fixedly connected to the inner wall of the motor housing 1 through a connecting plate, and a gear ring 51 is fixed to the inside of the support ring 5, and the second transmission toothed disc 524 can be meshed and connected with the gear ring 51; When the second fan blades 522 blow air into the heat dissipation channel 23 for heat dissipation, the motor shaft 2 will rotate and drive the support rod 52 to rotate. The support rod 52 will also drive the second transmission gear plate 524 to move. At this time, the gear ring 51 is in a state, and the teeth of the gear ring 51 will drive the second transmission gear plate 524 to rotate. When the second transmission gear plate 524 rotates, it will drive the first transmission gear plate 521 to rotate. The first transmission gear plate 521 can drive the second fan blades 522 to rotate and blow air, so that the second fan blades 522 can be driven to blow air and cool down during the rotation of the motor shaft 2.

[0032] like Figures 5 to 9 As shown, a spring 526 is sleeved on the outside of the moving rod 525, one end of the spring 526 is fixedly connected to the moving rod 525, and the other end of the spring 526 is fixedly connected to one side of the inner wall of the movable hole 523. A take-up drum 53 is provided at one end of the connecting rod 251 away from the first baffle 24, and a second toothed disk 532 is fixed to the top of the take-up drum 53 through a rotating shaft. The second toothed disk 532 is meshed and connected with a second gear 252 at one end of the connecting rod 251 close to the take-up drum 53. A pull rope 531 is wound around the outside of the take-up drum 53, and the other end of the pull rope 531 is fixedly connected to the moving rod 525. During use, the first baffle 24 and the second baffle 25 will rotate at an angle. During preheating, the first baffle 24 rotates 90° to close the end of the heat dissipation channel 23. At this time, the second baffle 25 rotates to open the end of the circulation channel 231. At the same time, the second gear 252 at the end of the connecting rod 251 away from the first baffle 24 drives the second gear plate 532 to rotate. The second gear plate 532 drives the take-up disk 53 to rotate through the rotating shaft. At this time, the take-up disk 53 rotates to unwind the pull rope 531 outside it. Then the elastic force of the spring 526 pushes the second transmission gear plate 524 to move. At this time, the teeth of the second transmission gear plate 524 will be aligned with the teeth of the first transmission gear plate. The teeth of the disk 521 and the gear ring 51 lose engagement, and the second fan blade 522 will not rotate to blow air at this time, which can reduce the resistance to the rotation of the motor shaft 2. When heat dissipation is needed, the first baffle 24 rotates 90° in the opposite direction, and the second baffle 25 rotates 90° synchronously. At this time, the take-up disk 53 also rotates 90° in the opposite direction, and the take-up disk 53 reels the pull rope 531. At this time, the pull rope 531 pulls the moving rod 525, and the moving rod 525 pulls the second transmission gear disk 524 to engage with the first transmission gear disk 521 and the gear ring 51. At this time, the second fan blade 522 can be switched to a rotating state, and the start and stop states of the second fan blade 522 can be automatically switched to facilitate heat dissipation.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An axial flow fan blade permanent magnet motor rotor, characterized in that: The invention comprises a motor shaft (2) rotatably connected to the inside of a motor housing (1); an iron core (21) is fixed to the outside of the motor shaft (2); the iron core (21) is arranged inside the motor housing (1); a slot body is provided on the outside of the iron core (21); a permanent magnet (3) is fixed inside the slot body; a first fan blade (22) is fixed to one end of the motor shaft (2); the first fan blade (22) is arranged inside the motor housing (1); a plurality of heat dissipation channels (23) are provided at equal intervals inside the iron core (21); a plurality of circulation channels (231) are provided at equal intervals on one side of the heat dissipation channel (23); the circulation channel (231) is arranged between two adjacent permanent magnets (3); and a plurality of air outlets are provided at one end of the motor housing (1) away from the first fan blade (22).

2. The axial flow fan blade permanent magnet motor rotor according to claim 1, characterized in that: One end of the heat dissipation channel (23) away from the first fan blade (22) is rotatably connected to the first baffle (24), and one end of the circulation channel (231) away from the heat dissipation channel (23) is rotatably connected to the second baffle (25).

3. The axial flow fan blade permanent magnet motor rotor according to claim 2, characterized in that: The second baffles (25) are connected via a connecting rod (251), which is rotatably connected to the inside of the iron core (21). A first toothed disc (241) is fixed to the top of the first baffle (24) via a rotating shaft. Second gears (252) are fixed to both ends of the connecting rod (251), and the second gear (252) close to one end of the first toothed disc (241) is meshed and connected to the first toothed disc (241).

4. The axial flow fan blade permanent magnet motor rotor according to claim 3, characterized in that: A first gear (242) is fixed to the bottom end of the first baffle (24), one side of the first gear (242) is meshedly connected with a telescopic tooth plate (26), a telescopic hole is provided inside the iron core (21), and the telescopic tooth plate (26) forms a telescopic structure in the telescopic hole.

5. The axial flow fan blade permanent magnet motor rotor according to claim 1, characterized in that: An air collecting hood (4) is sleeved on the outside of the motor shaft (2). The air collecting hood (4) is arranged at an end of the motor housing (1) away from the first fan blade (22). Two sides of the air collecting hood (4) are fixedly connected to the inner wall of the motor housing (1) through support columns. An open end of the air collecting hood (4) is close to an end of the heat dissipation channel (23) away from the first fan blade (22). A plurality of air outlet pipes (41) are fixed at equal intervals on an end of the air collecting hood (4) away from the iron core (21). An end of the air outlet pipe (41) away from the air collecting hood (4) is connected to an air outlet hole of the motor housing (1), and the air outlet pipe (41) is connected to the inside of the air collecting hood (4).

6. The axial flow fan blade permanent magnet motor rotor according to claim 5, characterized in that: A slide rail (42) is provided on one side of the gas collecting hood (4) close to the iron core (21), a temperature sensor is provided inside the gas collecting hood (4), and a plurality of electric telescopic rods (421) are fixed at equal intervals between the slide rail (42) and the gas collecting hood (4).

7. The axial flow fan blade permanent magnet motor rotor according to claim 6, characterized in that: A sliding plate (261) is fixed to one end of the telescopic tooth plate (26) away from the first gear (242), and balls are rotatably connected on both sides of the sliding plate (261). A sliding groove is provided on the outer side of the slide rail (42), and the bottom end of the sliding plate (261) is slidably connected to the inside of the sliding groove of the slide rail (42), and the balls on both sides of the sliding plate (261) are tightly attached to the inner wall of the sliding groove of the slide rail (42).

8. The axial flow fan blade permanent magnet motor rotor according to claim 1, characterized in that: A plurality of support rods (52) are fixed at equal intervals on the outer side of one end of the motor shaft (2) close to the first fan blade (22); a second fan blade (522) is rotatably connected to one side of the support rod (52) close to the heat dissipation channel (23); and an end of the second fan blade (522) away from the support rod (52) extends to the interior of the heat dissipation channel (23).

9. The axial flow fan blade permanent magnet motor rotor according to claim 8, characterized in that: A first transmission toothed disc (521) is fixed to one end of the second blade (522) away from the heat dissipation channel (23); a movable hole (523) is provided at the top end of the support rod (52); a moving rod (525) is slidably connected to the inside of the movable hole (523); an end of the moving rod (525) close to the first transmission toothed disc (521) is rotatably connected to the second transmission toothed disc (524); the second transmission toothed disc (524) can be meshedly connected to the first transmission toothed disc (521); a support ring (5) is provided outside the end of the motor shaft (2) close to the first blade (22); the support ring (5) is provided between the iron core (21) and the first blade (22); the outer side of the support ring (5) is fixedly connected to the inner wall of the motor housing (1) via a connecting plate; a toothed ring (51) is fixed inside the support ring (5); the second transmission toothed disc (524) can be meshedly connected to the toothed ring (51).

10. The axial flow fan blade permanent magnet motor rotor according to claim 9, characterized in that: A spring (526) is sleeved on the outside of the moving rod (525), one end of the spring (526) is fixedly connected to the moving rod (525), and the other end of the spring (526) is fixedly connected to one side of the inner wall of the movable hole (523). A wire take-up drum (53) is provided at one end of the connecting rod (251) away from the first baffle (24), a second toothed disk (532) is fixed to the top of the wire take-up drum (53) via a rotating shaft, the second toothed disk (532) is meshedly connected to a second gear (252) at one end of the connecting rod (251) close to the wire take-up drum (53), a pull rope (531) is wound around the outside of the wire take-up drum (53), and the other end of the pull rope (531) is fixedly connected to the moving rod (525).

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