A permanent magnet motor with high dynamic response

Abstract

The present invention relates to the technical field of permanent magnet motors, and discloses a permanent magnet motor with high dynamic response, including a motor body. A protective cover is installed on the right side of the motor body. A transmission shaft is rotatably connected to the inner wall of the motor body. A turntable is fixedly connected to the circumferential surface of the transmission shaft. A conical block is fixedly connected to the right side of the turntable. Blades are fixedly connected to the circumferential surface of the conical block. A drying mechanism is arranged on the inner wall of the protective cover. A replacement mechanism is arranged on the inner wall of the blade. The present invention can allow the air entering from the outside to first enter the filter tray and be dehumidified and dried by the desiccant in the filter tray, preventing the moisture in the air from contacting the inner wall of the protective cover and the right side of the permanent magnet motor, thereby causing the metal parts inside to rust. At the same time, the filter tray drives the transmission plate on the inner wall to rotate and turn the desiccant inside the filter tray, thereby improving the contact area between the desiccant and the air.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet motors, and specifically to a permanent magnet motor with high dynamic response. Background Art

[0002] A permanent magnet motor is a motor that uses permanent magnet materials as the rotor magnetic field source. It is widely used in various fields, including electric vehicles, household appliances, industrial automation, etc. A permanent magnet motor with high dynamic response usually has the ability to start and stop quickly, and is suitable for applications that require rapid changes in speed and load, such as electric vehicles and industrial automation.

[0003] The patent with the publication number CN217824510U discloses a permanent magnet motor, which includes a permanent magnet motor rotating shaft, anti-slip protrusions, and a power socket. The first connecting piece is installed on the top of the first permanent magnet motor housing. A second connecting piece is arranged on the outside of the first connecting piece, and the second connecting piece is arranged on the top of the second permanent magnet motor housing. A locking nut is arranged on the outer side of the first connecting piece. The locking nut and the bolt are mutually matched. The bolt penetrates through the second connecting piece. The anti-slip protrusions are installed on the bottom surface of the anti-slip bottom plate. This patent designs the first connecting piece, the second connecting piece, the rubber gasket, the locking nut, and the bolt at the top and bottom of the first permanent magnet motor housing and the second permanent magnet motor housing to form a disassembly and assembly structure, making the disassembly of the first permanent magnet motor housing and the second permanent magnet motor housing more convenient, and facilitating maintenance personnel to maintain and repair the components inside the permanent magnet motor. However, when this device is used in a humid environment, the external humid air will enter the motor, which will cause the metal parts inside the motor to be affected by moisture and rust, thereby affecting its service life. Therefore, a permanent magnet motor with high dynamic response is proposed to solve the above problems. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a permanent magnet motor with high dynamic response for the deficiencies in the above-mentioned prior art.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a permanent magnet motor with high dynamic response, including a motor body, a protective cover is installed on the right side of the motor body, a transmission shaft is rotatably connected to the inner wall of the motor body, a turntable is fixedly connected to the circumferential surface of the transmission shaft, a conical block is fixedly connected to the right side of the turntable, and blades are fixedly connected to the circumferential surface of the conical block; a drying mechanism is arranged on the inner wall of the protective cover, a replacement mechanism is arranged on the inner wall of the blade, and a protection mechanism is arranged on the inner wall of the protective cover; the drying mechanism includes a filter disc, a transmission plate, a stop block and a slider, the filter disc is rotatably connected to the circumferential surface of the transmission shaft, the transmission plate is fixedly connected to the inner wall of the filter disc, the stop block is fixedly connected to the left side of the filter disc, and the slider is slidably connected to the inner wall on the right side of the blade; the stop block is in contact with the slider, the circumferential surface of the filter disc is in contact with the inner wall of the protective cover, and a first spring is arranged between the side of the slider away from the conical block and the inner wall of the blade; the circumferential surface of the transmission shaft is fixedly connected to the inner wall of the conical block, and the circumferential surface of the transmission shaft is rotatably connected to the inner wall of the protective cover. When the permanent magnet motor is in use, the transmission shaft will rotate and drive the turntable to rotate, the turntable drives the conical block to rotate, the conical block drives the blade to rotate, the blade will suck the outside air into the protective cover and blow it out from the left side of the protective cover through the through hole, the blown air will contact the heat dissipation fins on the surface of the permanent magnet motor and dissipate heat from it, and the outside air entering will first enter the filter disc and be dehumidified and dried by the desiccant in the filter disc to prevent the moisture in the air from contacting the inner wall of the protective cover and the right side of the permanent magnet motor, thereby causing the metal parts inside to rust. At the same time, when the blade rotates slowly, it will drive the slider to rotate, the slider drives the stop block to rotate, the stop block drives the filter disc to rotate, and the filter disc drives the transmission plate on the inner wall to rotate and turn the desiccant inside the filter disc, thereby improving the contact area between the desiccant and the air. When the permanent magnet motor operates normally, it will drive the blade to rotate rapidly. At this time, the centrifugal force generated by the rotation of the blade is relatively large, which will cause the slider to overcome the elastic force of the spring and move, so that the slider no longer contacts the stop block, and thus it is impossible to drive the filter disc to rotate together. Therefore, when the permanent magnet motor rotates at high speed, it will not drive the filter disc to rotate, reducing the wear of the filter disc and preventing the filter disc from affecting the high-speed operation of the permanent magnet motor.

[0006] Preferably, the replacement mechanism includes a moving block, a rotating rod, a transmission rod, and a guiding block. The moving block is slidably connected to the inner wall on the right side of the transmission shaft. The rotating rod is rotatably connected to the inner wall of the conical block through a torsion spring. The transmission rod is slidably connected to the inner wall of the blade through an elastic member. The guiding block is fixedly connected to one end of the transmission rod away from the transmission shaft. The rotating rod contacts the inner wall of the transmission shaft and the inner wall of the blade. A second spring is provided between the moving block and the inner wall of the transmission shaft. The replacement mechanism further includes a limiting rod, a rotating plate, a push rod, and a limiting plate. The limiting rod is fixedly connected to the inner wall of the transmission rod. The rotating plate is rotatably connected to the inner wall of the protective cover through a torsion spring. The limiting plate is fixedly connected to the inner wall of the protective cover. The push rod is slidably connected to the inner wall of the limiting plate. The circumferential surface of the limiting rod contacts the inner wall of the rotating rod. The rotating rod contacts the inner wall of the transmission rod. One side of the guiding block close to the transmission rod contacts the blade. The desiccant in the filter tray needs to be replaced every fixed time. At this time, a tool is inserted into the right side of the transmission shaft. The tool enters the transmission shaft and pushes the moving block to move. The moving block pushes the rotating rod to rotate. The rotating rod leaves the limiting rod in the transmission rod. At this time, the limiting rod in the transmission rod is no longer limited by the rotating rod. The magnet in the moving block will push the transmission rod and the magnet inside it to move through repulsion, so that the transmission rod drives the guiding block to extend out of the blade. At this time, the transmission shaft is rotated. The transmission shaft drives the blade to rotate. The blade drives the guiding block to rotate through the transmission rod. The guiding block pushes the push rod to move through an inclined surface. The push rod pushes the rotating plate to open through an inclined surface. At this time, the filter tray will also rotate with the transmission shaft, and the notch of the filter tray will coincide with the opened rotating plate, so that the desiccant inside the filter tray can be discharged and new desiccant can be added.

[0007] Preferably, the protection mechanism includes an inclined block, an elastic soft rod, and a telescopic rod. The elastic soft rod is slidably connected to the inner wall of the protective cover. The inclined block is fixedly connected to one end of the elastic soft rod. The telescopic rod is fixedly connected to the other end of the elastic soft rod. The protection mechanism further includes an arc plate, an arc block, and a filter plate. The arc plate is fixedly connected to the surface of the telescopic end of the telescopic rod. The filter plate is installed on the inner wall of the protective cover. The arc block is fixedly connected to the left side of the filter plate. The arc block contacts the arc plate. The surface of the telescopic end of the telescopic rod contacts the inner wall of the protective cover. The inclined block contacts the guiding block. The fixed end of the telescopic rod is fixedly connected to the inner wall of the protective cover. When external air enters the protective cover, the filter plate on the inner wall of the protective cover will filter the dust in the external air. When the desiccant is replaced, the worker can scrape the dust accumulated on the surface of the filter plate by the way. When the guiding block moves, it will drive the inclined block to move upward. The inclined block drives the telescopic rod to move through the elastic soft rod. The movement of the telescopic rod will drive the arc plate to move. When the arc plate moves, it will contact the arc block on the filter plate, causing the arc block to be impacted and vibrate. The vibration can cause the dust in the pores of the filter plate to fall off, further improving the cleaning effect of the dust on the surface of the filter plate.

[0008] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0009] 1. For the high-dynamic-response permanent magnet motor, through the coordinated operation among the motor body, protective cover, transmission shaft, turntable, conical block, blade, filter disc, transmission plate, stop block, slider, and replacement mechanism, the air entering from the outside will first enter the filter disc, and the desiccant in the filter disc will remove moisture and dry it, preventing the moisture in the air from contacting the inner wall of the protective cover and the right side of the permanent magnet motor, thus avoiding rusting of the internal metal parts. At the same time, the filter disc drives the transmission plate on the inner wall to rotate and turn the desiccant inside the filter disc, thereby increasing the contact area between the desiccant and the air.

[0010] 2. For the high-dynamic-response permanent magnet motor, through the coordinated operation among the moving block, rotating rod, transmission rod, guiding block, limiting rod, rotating plate, push rod, and limiting plate, the desiccant in the filter disc needs to be replaced at regular intervals. Make the notch of the filter disc coincide with the opened rotating plate, so that the desiccant inside the filter disc can be discharged, and desiccant can be added again.

[0011] 3. For the high-dynamic-response permanent magnet motor, through the coordinated operation among the inclined block, elastic soft rod, telescopic rod, arc-shaped plate, arc-shaped block, and filter plate, when the outside air enters the protective cover, the filter plate on the inner wall of the protective cover will filter the dust in the outside air. At the same time, when the arc-shaped plate moves, it will contact the arc-shaped block on the filter plate, causing the arc-shaped block to be impacted and vibrate. The vibration can prompt the dust in the pores of the filter plate to fall off, further improving the cleaning effect of the dust on the surface of the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 is a half-sectional view of the motor body structure of the present invention;

[0014] Figure 3 is a half-sectional view of the protective cover structure of the present invention;

[0015] Figure 4 is a half-sectional view of the turntable structure of the present invention;

[0016] Figure 5 is a half-sectional view of the filter disc structure of the present invention;

[0017] Figure 6 is of the present invention Figure 5 is an enlarged view of the structure at A in;

[0018] Figure 7 is a half-sectional view of the blade structure of the present invention;

[0019] Figure 8 For the present invention Figure 7 Enlarged view of the structure at position B in the present invention;

[0020] Figure 9 For the present invention Figure 7 Enlarged view of the structure at position C in the present invention;

[0021] Figure 10 Schematic diagram of the filter plate structure of the present invention;

[0022] Figure 11 For the present invention Figure 10 Enlarged view of the structure at position D in the present invention.

[0023] In the figure: 1, motor body; 2, protective cover; 3, transmission shaft; 4, turntable; 5, conical block; 6, blade; 7, drying mechanism; 71, filter disc; 72, transmission plate; 73, stop block; 74, slider; 8, replacement mechanism; 81, moving block; 82, rotating rod; 83, transmission rod; 84, guide block; 85, limiting rod; 86, rotating plate; 87, push rod; 88, limiting plate; 9, protection mechanism; 91, inclined block; 92, elastic soft rod; 93, telescopic rod; 94, arc plate; 95, arc block; 96, filter plate. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Please refer to Figures 1 - 11, an embodiment of the present invention is: a permanent magnet motor with high dynamic response, including a motor body 1. A protective cover 2 is installed on the right side of the motor body 1. A transmission shaft 3 is rotatably connected to the inner wall of the motor body 1. A turntable 4 is fixedly connected to the circumferential surface of the transmission shaft 3. A conical block 5 is fixedly connected to the right side of the turntable 4. A blade 6 is fixedly connected to the circumferential surface of the conical block 5; a drying mechanism 7 is arranged on the inner wall of the protective cover 2, a replacement mechanism 8 is arranged on the inner wall of the blade 6, and a protection mechanism 9 is arranged on the inner wall of the protective cover 2; the drying mechanism 7 includes a filter disk 71, a transmission plate 72, a stop block 73 and a slider 74. The filter disk 71 is rotatably connected to the circumferential surface of the transmission shaft 3. The transmission plate 72 is fixedly connected to the inner wall of the filter disk 71. The stop block 73 is fixedly connected to the left side of the filter disk 71. The slider 74 is slidably connected to the inner wall on the right side of the blade 6. When the permanent magnet motor is in use, the transmission shaft 3 will rotate and drive the turntable 4 to rotate. The turntable 4 drives the conical block 5 to rotate. The conical block 5 drives the blade 6 to rotate. The blade 6 will suck the outside air into the protective cover 2 and blow it out from the left side of the protective cover 2 through the through hole. The blown air will contact the heat dissipation fins on the surface of the permanent magnet motor and dissipate heat for it. The air entering from the outside will first enter the filter disk 71 and be dehumidified and dried by the desiccant in the filter disk 71 to prevent the moisture in the air from contacting the inner wall of the protective cover 2 and the right side of the permanent magnet motor and causing the metal parts inside to rust; the stop block 73 contacts the slider 74. The circumferential surface of the filter disk 71 contacts the inner wall of the protective cover 2. A first spring is arranged between the side of the slider 74 away from the conical block 5 and the inner wall of the blade 6; the circumferential surface of the transmission shaft 3 is fixedly connected to the inner wall of the conical block 5. The circumferential surface of the transmission shaft 3 is rotatably connected to the inner wall of the protective cover 2. When the blade 6 rotates slowly, it will drive the slider 74 to rotate. The slider 74 drives the stop block 73 to rotate. The stop block 73 drives the filter disk 71 to rotate. The filter disk 71 drives the transmission plate 72 on the inner wall to rotate and turn over the desiccant inside the filter disk 71, thereby improving the contact area between the desiccant and the air. When the permanent magnet motor operates normally, it will drive the blade 6 to rotate rapidly. At this time, the centrifugal force generated by the rotation of the blade 6 is relatively large, which will cause the slider 74 to overcome the elastic force of the spring and move, so that the slider 74 no longer contacts the stop block 73, and thus it cannot drive the filter disk 71 to rotate together. Therefore, when the permanent magnet motor rotates at high speed, it will not drive the filter disk 71 to rotate, reducing the wear of the filter disk 71 and preventing the filter disk 71 from affecting the high-speed operation of the permanent magnet motor.

[0026] Working principle: When the permanent magnet motor is in use, the transmission shaft 3 rotates and drives the turntable 4 to rotate. The turntable 4 drives the tapered block 5 to rotate, and the tapered block 5 drives the blade 6 to rotate. The blade 6 sucks the outside air into the protective cover 2 and blows it out from the left side of the protective cover 2 through the through hole. The blown air contacts the heat dissipation fins on the surface of the permanent magnet motor and dissipates heat from it. The air entering from the outside first enters the filter disc 71, and the desiccant in the filter disc 71 removes moisture and dries it, preventing the moisture in the air from contacting the inner wall of the protective cover 2 and the right side of the permanent magnet motor, thereby causing the metal parts inside to rust. At the same time, when the blade 6 rotates slowly, it drives the slider 74 to rotate. The slider 74 drives the stopper 73 to rotate, and the stopper 73 drives the filter disc 71 to rotate. The filter disc 71 drives the transmission plate 72 on the inner wall to rotate and turn the desiccant inside the filter disc 71, thereby increasing the contact area between the desiccant and the air. When the permanent magnet motor operates normally, it drives the blade 6 to rotate rapidly. At this time, the centrifugal force generated by the rotation of the blade 6 is relatively large, which causes the slider 74 to overcome the elastic force of the spring and move, so that the slider 74 no longer contacts the stopper 73, and thus cannot drive the filter disc 71 to rotate together. Therefore, when the permanent magnet motor rotates at high speed, it does not drive the filter disc 71 to rotate, reducing the wear of the filter disc 71 and preventing the filter disc 71 from affecting the high-speed operation of the permanent magnet motor.

[0027] Please refer to Figures 1 - 11, on the basis of the above embodiments, in another embodiment of the present invention, the replacement mechanism 8 includes a moving block 81, a rotating rod 82, a transmission rod 83 and a guiding block 84. The moving block 81 is slidably connected to the inner wall on the right side of the transmission shaft 3. The rotating rod 82 is rotatably connected to the inner wall of the conical block 5 through a torsion spring. The transmission rod 83 is slidably connected to the inner wall of the blade 6 through an elastic member. The guiding block 84 is fixedly connected to one end of the transmission rod 83 away from the transmission shaft 3. The rotating rod 82 contacts the inner wall of the transmission shaft 3, and the rotating rod 82 contacts the inner wall of the blade 6. A second spring is provided between the moving block 81 and the inner wall of the transmission shaft 3. The replacement mechanism 8 further includes a limiting rod 85, a rotating plate 86, a push rod 87 and a limiting plate 88. The limiting rod 85 is fixedly connected to the inner wall of the transmission rod 83. The desiccant in the filter disc 71 needs to be replaced at regular intervals. At this time, a tool is inserted into the right side of the transmission shaft 3. The tool enters the transmission shaft 3 and pushes the moving block 81 to move. The moving block 81 pushes the rotating rod 82 to rotate. The rotating rod 82 leaves the limiting rod 85 in the transmission rod 83. At this time, the limiting rod 85 in the transmission rod 83 is no longer limited by the rotating rod 82. The magnet in the moving block 81 will push the transmission rod 83 and the magnet inside it to move through repulsion. The rotating plate 86 is rotatably connected to the inner wall of the protective cover 2 through a torsion spring. The limiting plate 88 is fixedly connected to the inner wall of the protective cover 2. The push rod 87 is slidably connected to the inner wall of the limiting plate 88. The circumferential surface of the limiting rod 85 contacts the inner wall of the rotating rod 82. The rotating rod 82 contacts the inner wall of the transmission rod 83. One side of the guiding block 84 close to the transmission rod 83 contacts the blade 6, so that the transmission rod 83 drives the guiding block 84 to extend out of the blade 6. At this time, the transmission shaft 3 is rotated. The transmission shaft 3 drives the blade 6 to rotate. The blade 6 drives the guiding block 84 to rotate through the transmission rod 83. The guiding block 84 pushes the push rod 87 to move through an inclined surface. The push rod 87 pushes the rotating plate 86 to open through an inclined surface. At this time, the filter disc 71 will also rotate together with the transmission shaft 3, and the notch of the filter disc 71 will coincide with the opened rotating plate 86, so that the desiccant inside the filter disc 71 can be discharged and new desiccant can be added.

[0028] The protection mechanism 9 includes an inclined block 91, an elastic soft rod 92, and a telescopic rod 93. The elastic soft rod 92 is slidably connected to the inner wall of the protective cover 2. The inclined block 91 is fixedly connected to one end of the elastic soft rod 92. The telescopic rod 93 is fixedly connected to the other end of the elastic soft rod 92. When external air enters the protective cover 2, the filter plate 96 on the inner wall of the protective cover 2 will filter the dust in the external air. When the desiccant is replaced, the worker can conveniently scrape off the dust accumulated on the surface of the filter plate 96. The protection mechanism 9 further includes an arc plate 94, an arc block 95, and a filter plate 96. The arc plate 94 is fixedly connected to the surface of the telescopic end of the telescopic rod 93. The filter plate 96 is installed on the inner wall of the protective cover 2. The arc block 95 is fixedly connected to the left side of the filter plate 96. The arc block 95 contacts the arc plate 94. The surface of the telescopic end of the telescopic rod 93 contacts the inner wall of the protective cover 2. The inclined block 91 contacts the guide block 84. The fixed end of the telescopic rod 93 is fixedly connected to the inner wall of the protective cover 2. When the guide block 84 moves, it will drive the inclined block 91 to move upward. The inclined block 91 drives the telescopic rod 93 to move through the elastic soft rod 92. The movement of the telescopic rod 93 will drive the arc plate 94 to move. When the arc plate 94 moves, it will contact the arc block 95 on the filter plate 96, causing the arc block 95 to be impacted and vibrate. The vibration can prompt the dust in the pores of the filter plate 96 to fall off, further improving the cleaning effect of the dust on the surface of the filter plate 96.

[0029] Working principle: The desiccant in the filter disc 71 needs to be replaced at regular intervals. At this time, a tool is inserted into the right side of the transmission shaft 3. The tool enters the transmission shaft 3 and pushes the moving block 81 to move. The moving block 81 pushes the rotating rod 82 to rotate. The rotating rod 82 leaves the limiting rod 85 in the transmission rod 83. At this time, the limiting rod 85 in the transmission rod 83 is no longer limited by the rotating rod 82. The magnet in the moving block 81 will push the transmission rod 83 and the magnet inside it to move through repulsion, so that the transmission rod 83 drives the guide block 84 to extend out of the blade 6. At this time, the transmission shaft 3 is rotated. The transmission shaft 3 drives the blade 6 to rotate. The blade 6 drives the guide block 84 to rotate through the transmission rod 83. The guide block 84 pushes the push rod 87 to move through the inclined plane. The push rod 87 pushes the rotating plate 86 to open through the inclined plane. At this time, the filter disc 71 will also rotate together with the transmission shaft 3, and the notch of the filter disc 71 will coincide with the opened rotating plate 86, so that the desiccant inside the filter disc 71 can be discharged and new desiccant can be added.

[0030] When outside air enters the protective cover 2, the filter plate 96 on the inner wall of the protective cover 2 filters the dust in the outside air. When the desiccant is replaced, the worker can conveniently scrape off the dust accumulated on the surface of the filter plate 96. Moreover, when the guiding block 84 moves, it drives the inclined block 91 to move upward. The inclined block 91 drives the telescopic rod 93 to move through the elastic soft rod 92. The movement of the telescopic rod 93 drives the arc-shaped plate 94 to move. When the arc-shaped plate 94 moves, it contacts the arc-shaped block 95 on the filter plate 96, causing the arc-shaped block 95 to be impacted and vibrate. The vibration can prompt the dust in the pores of the filter plate 96 to fall off, further improving the cleaning effect of the dust on the surface of the filter plate 96.

[0031] The present invention provides a permanent magnet motor with high dynamic response. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented by using the prior art.

Claims

1. A permanent magnet motor with high dynamic response, comprising a motor body (1), characterized in that: A protective cover (2) is installed on the right side of the motor body (1). A transmission shaft (3) is rotatably connected to the inner wall of the motor body (1). A turntable (4) is fixedly connected to the circumferential surface of the transmission shaft (3). A tapered block (5) is fixedly connected to the right side of the turntable (4). Blades (6) are fixedly connected to the circumferential surface of the tapered block (5). A drying mechanism (7) is arranged on the inner wall of the protective cover (2). A replacement mechanism (8) is arranged on the inner wall of the blades (6). A protection mechanism (9) is arranged on the inner wall of the protective cover (2). The drying mechanism (7) includes a filter disc (71), a transmission plate (72), a stop block (73) and a slider (74). The filter disc (71) is rotatably connected to the circumferential surface of the transmission shaft (3). The transmission plate (72) is fixedly connected to the inner wall of the filter disc (71). The stop block (73) is fixedly connected to the left side of the filter disc (71). The slider (74) is slidably connected to the inner wall on the right side of the blades (6). The stop block (73) contacts the slider (74). The circumferential surface of the filter disc (71) contacts the inner wall of the protective cover (2). A first spring is arranged between the side of the slider (74) away from the tapered block (5) and the inner wall of the blades (6). The circumferential surface of the transmission shaft (3) is fixedly connected to the inner wall of the tapered block (5). The circumferential surface of the transmission shaft (3) is rotatably connected to the inner wall of the protective cover (2). The replacement mechanism (8) includes a moving block (81), a rotating rod (82), a transmission rod (83) and a guiding block (84). The moving block (81) is slidably connected to the inner wall on the right side of the transmission shaft (3). The rotating rod (82) is rotatably connected to the inner wall of the tapered block (5) through a torsion spring. The transmission rod (83) is slidably connected to the inner wall of the blades (6) through an elastic member. The guiding block (84) is fixedly connected to the end of the transmission rod (83) away from the transmission shaft (3). The replacement mechanism (8) further includes a limiting rod (85), a rotating plate (86), a push rod (87) and a limiting plate (88). The limiting rod (85) is fixedly connected to the inner wall of the transmission rod (83). The rotating plate (86) is rotatably connected to the inner wall of the protective cover (2) through a torsion spring. The limiting plate (88) is fixedly connected to the inner wall of the protective cover (2). The push rod (87) is slidably connected to the inner wall of the limiting plate (88).

2. A permanent magnet motor with high dynamic response according to claim 1, characterized in that: The rotating rod (82) contacts the inner wall of the transmission shaft (3). The rotating rod (82) contacts the inner wall of the blades (6). A second spring is arranged between the moving block (81) and the inner wall of the transmission shaft (3).

3. A permanent magnet motor with high dynamic response according to claim 2, characterized in that: The circumferential surface of the limiting rod (85) contacts the inner wall of the rotating rod (82). The rotating rod (82) contacts the inner wall of the transmission rod (83). The side of the guiding block (84) close to the transmission rod (83) contacts the blades (6).

4. A permanent magnet motor with high dynamic response according to claim 3, characterized in that: The protection mechanism (9) includes an inclined block (91), an elastic soft rod (92) and a telescopic rod (93). The elastic soft rod (92) is slidably connected to the inner wall of the protective cover (2). The inclined block (91) is fixedly connected to one end of the elastic soft rod (92). The telescopic rod (93) is fixedly connected to the other end of the elastic soft rod (92).

5. A permanent magnet motor with high dynamic response according to claim 4, characterized in that: The protection mechanism (9) further includes an arc-shaped plate (94), an arc-shaped block (95) and a filter plate (96). The arc-shaped plate (94) is fixedly connected to the surface of the telescopic end of the telescopic rod (93). The filter plate (96) is installed on the inner wall of the protective cover (2). The arc-shaped block (95) is fixedly connected to the left side of the filter plate (96).

6. A permanent magnet motor with high dynamic response according to claim 5, characterized in that: The arc-shaped block (95) contacts the arc-shaped plate (94). The surface of the telescopic end of the telescopic rod (93) contacts the inner wall of the protective cover (2). The inclined block (91) contacts the guide block (84). The fixed end of the telescopic rod (93) is fixedly connected to the inner wall of the protective cover (2).

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