Driving permanent magnet synchronous motor with heat dissipation mechanism

Abstract

The invention discloses a driving permanent magnet synchronous motor with a heat dissipation mechanism, and relates to the technical field of 999. The outer side face of the rear end cover is fixedly connected with the inner side face of a base, a copper bar is embedded in the side, away from a shell, of the rear end cover, the inner side face of the rear end cover is fixedly connected with the surface of the copper bar, the side, away from the rear end cover, of the copper bar makes contact with the base, and the base is grounded; the air cooling assembly is fixedly connected with the end, close to the rear end cover, of the rotating shaft, the natural cooling assembly surrounds the outer portion of the shell, the inner side face of the natural cooling assembly is fixedly connected with the outer side face of the shell, the natural cooling assembly can increase the contact area with the outside, and the heat dissipation effect is enhanced. The rear end cover sucks air in the gap of the natural cooling assembly into the rear end cover to form flowing airflow, so that a better cooling effect is achieved, and the cooling effect of the air cooling assembly is radiated to the outside of the shell.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet synchronous motors, and in particular to a driving permanent magnet synchronous motor with a heat dissipation mechanism. Background Art

[0002] Permanent magnet synchronous motor is a synchronous motor that uses permanent magnets to establish an excitation magnetic field. It consists of a stator, a rotor, an end cover, a bearing, etc. The stator has a winding, and the alternating current is connected to generate a rotating magnetic field. The rotor is inlaid with permanent magnets, and the stator and rotor magnetic fields interact to achieve synchronous rotation. It has the characteristics of high efficiency and energy saving, high power density, excellent speed regulation performance, stable and reliable operation, etc. It is widely used in new energy vehicles, industrial automation, home appliances and other fields;

[0003] Overheating of the motor can cause many hazards. First, it accelerates the aging of the motor insulation and shortens its service life. In severe cases, the insulation fails and causes a short circuit fault. Overheating causes uneven thermal expansion of the internal components of the motor, causing increased mechanical wear and reduced precision, resulting in abnormal operating noise and increased vibration. Excessive temperature can also affect the power transmission and lubrication effects, resulting in a sharp drop in drive efficiency, frequent equipment failures, and affecting production operations. The existing cooling structure is usually unable to cool the entire motor at the same time, so we proposed a drive permanent magnet synchronous motor with a heat dissipation mechanism. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a driving permanent magnet synchronous motor with a heat dissipation mechanism, comprising:

[0005] A base, wherein a motor is disposed on the top of the base, and the outer side surface of the motor is fixedly connected to the inner side surface of the base;

[0006] A heat dissipation device, which is arranged at the tail of the motor and is used to dissipate heat from the tail of the motor;

[0007] Wherein, the motor comprises:

[0008] A shell, the outer side of which is fixedly connected to the inner side of the base;

[0009] A rotating shaft, the rotating shaft is arranged inside the shell, and both ends of the rotating shaft extend to the outside of the shell, and the rotating shaft is fixedly connected to the rotor inside the shell;

[0010] The heat dissipation device comprises:

[0011] A rear end cover, the outer side surface of the rear end cover is fixedly connected to the inner side surface of the base, and the rear end cover is arranged at the rear of the shell;

[0012] A copper bar, wherein the copper bar is embedded on a side of the rear end cover away from the housing, and the inner side surface of the rear end cover is fixedly connected to the surface of the copper bar, and the side of the copper bar away from the rear end cover is in contact with the base, and the base is grounded;

[0013] An air cooling component, which is arranged inside the rear end cover and is fixedly connected to an end of the rotating shaft close to the rear end cover;

[0014] A natural cooling component, which is disposed around the outside of the shell, and the inner side of the natural cooling component is fixedly connected to the outer side of the shell;

[0015] Start the motor and the motor shaft rotates, driving the air cooling component to start. The air cooling component blows out air, and the air blows along the shell to the rear end cover, and then passes through the rear end cover to cool the tail of the motor. The heat on the shell is transferred to the natural cooling component. The natural cooling component can increase the contact area with the outside world, thereby enhancing the heat dissipation effect. Due to the flow of air in the rear end cover, the pressure is reduced, so that the air in the gap of the natural cooling component is sucked into the rear end cover to form a flowing airflow, thereby achieving a better cooling effect, and radiating the cooling effect of the air cooling component to the outside of the shell. The setting of the copper strip, metallic copper has a better conductive effect, and static electricity will preferentially pass through the copper strip, which can conduct the static electricity on the rear end cover into the base and finally into the earth, thereby avoiding the rear end cover from adsorbing a large amount of dust due to static electricity, thereby avoiding clogging of the rear end cover and obtaining a better cooling effect.

[0016] Furthermore, a grounding socket is fixedly connected to one side of the base away from the shell, four grounding sockets are provided, and the four grounding sockets are used for grounding the base, and static electricity passes through the copper bar, the base, and the grounding socket in sequence, and is finally introduced into the earth.

[0017] Furthermore, the natural cooling component includes a cylinder, the inner side of the cylinder is fixedly connected to the outer side of the shell, the outer side of the cylinder is fixedly connected to a heat sink, and the heat on the surface of the shell is transferred to the cylinder and then to the heat sink.

[0018] Furthermore, the heat sink is configured to be S-shaped, and a plurality of the heat sinks are arranged along the circumference of the cylinder, and the plurality of heat sinks are stacked on each other. The S-shaped heat sink can increase the contact area with the air to obtain a better cooling effect, and a plurality of heat sinks stacked on each other form a plurality of gaps between each other for airflow to flow, thereby better utilizing the airflow blown out by the air-cooling component.

[0019] Furthermore, an insert plate is fixedly connected to the inner side surface of the cylinder, the insert plate is embedded in the shell, and the surface of the insert plate is fixedly connected to the inner side surface of the shell. A number of the insert plates are evenly distributed along the inner side surface of the cylinder. The insert plate is inserted into the shell to increase the contact area with the shell, thereby allowing the heat in the shell to be quickly conducted, achieving a better cooling effect.

[0020] Furthermore, the air cooling component includes a sleeve, which is arranged on a side of the shell close to the rear end cover, and the inner side surface of the sleeve is fixedly connected to the surface of the rotating shaft, and a rotating rod is arranged on the side of the sleeve away from the rotating shaft, and the surface of the rotating rod is fixedly connected to the inner side surface of the sleeve, and the surface of the rotating rod is fixedly connected to fan blades. The rotating shaft rotates, which drives the sleeve to rotate, drives the rotating rod to rotate, and thus drives the fan blades to rotate. The fan blades drive the airflow to flow, thereby cooling the tail of the motor. At the same time, the flowing airflow causes the pressure in the rear end cover to decrease, thereby driving the air flow in the gap of the heat sink to radiate the air cooling effect to the entire shell.

[0021] Furthermore, further, the fan blades are inclined toward the rear end cover, and a plurality of the fan blades are evenly distributed along the circumference of the rotating rod, and the plurality of the fan blades are all arranged inside the rear end cover, and the fan blades drive the airflow to flow from the outer shell to the rear end cover.

[0022] Furthermore, a rotating sleeve is provided at one end of the rotating rod away from the shaft sleeve, and the inner side surface of the rotating sleeve is rotatably connected to the surface of the rotating rod, and the side of the rotating sleeve away from the rotating rod is fixedly connected to the inner side surface of the rear end cover. The rotating sleeve is provided, and the rotating rod rotates inside the rotating sleeve, which can limit the rotation of the rotating rod to prevent the fan blades from shaking when in use.

[0023] Furthermore, a protective shield is provided inside the rear end cover, and the holes of the protective shield are of a different type from the holes of the rear end cover. The protective shield is fixedly connected to a side of the outer shell close to the rear end cover, and a side of the protective shield away from the outer shell is fixedly connected to an inner side surface of the rear end cover, and the protective shield is provided outside a plurality of fan blades. The protective shield protects the fan blades and filters objects close to the fan blades to prevent the fan blades from being damaged by contact with hard objects. The holes of the protective shield are of a different type from the holes of the rear end cover, so that even if hard objects are artificially introduced, it is difficult to contact the fan blades, thereby achieving a better protective effect.

[0024] Furthermore, a metal wire is embedded inside the shield, and the metal wire is ring-shaped, and the surface of the metal wire is fixedly connected to the inner side of the shield. There are several metal wires evenly distributed inside the shield, and the densely distributed metal wires are crossed with the hole pattern of the shield to form a more dense filtering structure, which can more effectively prevent the fan blades from contacting the outside world and achieve better protection.

[0025] The present invention has the beneficial effects:

[0026] 1. The present invention provides a heat dissipation device, so that the natural cooling component can increase the contact area with the outside world, thereby enhancing the heat dissipation effect. Due to the flow of air flow in the rear end cover, the pressure is reduced, so that the air at the gap of the natural cooling component is sucked into the rear end cover to form a flowing airflow, thereby achieving a better cooling effect, and radiating the cooling effect of the air-cooled component to the outside of the shell. The copper strip is provided, and metallic copper has a better conductive effect. Static electricity will preferentially pass through the copper strip, and the static electricity on the rear end cover can be introduced into the base and finally into the earth, thereby avoiding the rear end cover from being adsorbed in large quantities due to static electricity, thereby avoiding clogging of the rear end cover and obtaining a better cooling effect.

[0027] 2. The present invention sets a natural light cooling component, and the S-shaped heat sink can increase the contact area with the air to obtain a better cooling effect. A number of heat sinks are stacked on each other, and a number of gaps are formed between each other for air flow to flow, thereby better utilizing the air flow blown out by the air cooling component. The plug-in board is inserted into the shell to increase the contact area with the shell, so that the heat in the shell is quickly conducted, achieving a better cooling effect.

[0028] 3. The present invention sets an air cooling component, and the fan blades drive the air flow to cool the tail of the motor. At the same time, the flowing air flow causes the pressure in the rear end cover to decrease, thereby driving the air flow in the gap between the heat sink plates, radiating the air cooling effect to the entire outer shell. A rotating sleeve is set, and a rotating rod rotates inside the rotating sleeve. The rotation of the rotating rod can be limited to prevent the fan blades from shaking when in use.

[0029] 4. The present invention provides a protective cover to protect the fan blades and filter objects close to the fan blades to prevent the fan blades from contacting hard objects and being damaged. The holes of the protective cover are different from the holes of the rear end cover, so that even if hard objects are artificially introduced, it is difficult for them to contact the fan blades, thereby achieving a better protective effect. The densely distributed metal wires, combined with the hole pattern of the protective cover, form a more dense filtering structure, which can more effectively prevent the fan blades from contacting the outside world and achieve a better protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a driving permanent magnet synchronous motor with a heat dissipation mechanism of the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the heat dissipation device of the present invention;

[0032] Figure 3 This is a schematic diagram of the structure of the grounding base of the present invention;

[0033] Figure 4 This is a schematic diagram of the structure of the natural cooling component of the present invention;

[0034] Figure 5 This is a schematic diagram of the plug board structure of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the air cooling component of the present invention;

[0036] Figure 7 This is a schematic diagram of the fan blade structure of the present invention;

[0037] Figure 8 This is a schematic diagram of the cross-sectional structure of the rear end cover of the present invention;

[0038] Fig. 9 It is a schematic diagram of the cross-sectional structure of the shield of the present invention.

[0039] In the figure: 1. base; 2. motor; 21. housing; 22. shaft; 3. heat dissipation device; 31. rear end cover; 32. copper bar; 33. air cooling component; 331. bushing; 332. rotating rod; 333. fan blade; 334. rotating sleeve; 335. shield; 336. metal wire; 34. natural cooling component; 341. cylinder; 342. heat sink; 343. plug-in board; 35. grounding socket. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0041] Example 1, please refer to Figure 1-Figure 6 The present invention is a driving permanent magnet synchronous motor with a heat dissipation mechanism, comprising:

[0042] A base 1, a motor 2 is arranged on the top of the base 1, and the outer side surface of the motor 2 is fixedly connected to the inner side surface of the base 1;

[0043] The heat dissipation device 3 is arranged at the rear of the motor 2 and is used to dissipate heat from the rear of the motor 2;

[0044] Among them, the motor 2 includes:

[0045] A housing 21, wherein the outer side surface of the housing 21 is fixedly connected to the inner side surface of the base 1;

[0046] A rotating shaft 22, which is disposed inside the housing 21, and both ends of the rotating shaft 22 extend to the outside of the housing 21, and the rotating shaft 22 is fixedly connected to the rotor inside the housing 21;

[0047] The heat dissipation device 3 comprises:

[0048] A rear end cover 31, the outer side of the rear end cover 31 is fixedly connected to the inner side of the base 1, and the rear end cover 31 is arranged at the rear of the housing 21;

[0049] The copper bar 32 is embedded on a side of the rear end cover 31 away from the housing 21, and the inner side of the rear end cover 31 is fixedly connected to the surface of the copper bar 32, and the side of the copper bar 32 away from the rear end cover 31 is in contact with the base 1, and the base 1 is grounded;

[0050] An air cooling assembly 33, which is disposed inside the rear end cover 31 and is fixedly connected to one end of the rotating shaft 22 close to the rear end cover 31;

[0051] A natural cooling component 34, which is disposed around the outside of the housing 21, and the inner side surface of the natural cooling component 34 is fixedly connected to the outer side surface of the housing 21;

[0052] The motor 2 is started, and the shaft 22 of the motor 2 rotates, driving the air cooling component 33 to start. The air cooling component 33 blows out air, and the air blows along the shell 21 to the rear cover 31, and then passes through the rear cover 31 to cool the tail of the motor 2. The heat on the shell 21 is transferred to the natural cooling component 34. The natural cooling component 34 can increase the contact area with the outside, thereby enhancing the heat dissipation effect. In addition, due to the flow of air in the rear cover 31, the pressure is reduced, so that the air in the gap of the natural cooling component 34 is sucked into the rear cover 31 to form a flowing airflow, thereby achieving a better cooling effect, and radiating the cooling effect of the air cooling component 33 to the outside of the shell 21. The copper strip 32 is set, and the metal copper has a better conductive effect. Static electricity will preferentially pass through the copper strip 32, and can conduct the static electricity on the rear cover 31 into the base 1, and finally into the earth, so as to avoid the rear cover 31 from causing a large amount of dust to be adsorbed due to static electricity, thereby avoiding the rear cover 31 from being blocked, and obtaining a better cooling effect.

[0053] A grounding socket 35 is fixedly connected to one side of the base 1 away from the housing 21. Four grounding sockets 35 are provided and used for grounding the base 1. Static electricity passes through the copper bar 32, the base 1, and the grounding socket 35 in sequence and is finally introduced into the earth.

[0054] The natural cooling component 34 includes a cylinder 341 , the inner side of the cylinder 341 is fixedly connected to the outer side of the shell 21 , and the outer side of the cylinder 341 is fixedly connected to a heat sink 342 . The heat on the surface of the shell 21 is transferred to the cylinder 341 and then to the heat sink 342 .

[0055] The heat sink 342 is configured to be S-shaped, and a plurality of heat sinks 342 are disposed along the circumference of the cylinder 341, and the plurality of heat sinks 342 are stacked on each other. The S-shaped heat sink 342 can increase the contact area with the air to obtain a better cooling effect, and a plurality of heat sinks 342 stacked on each other form a plurality of gaps between each other for air flow to flow, thereby better utilizing the air flow blown out by the air-cooling component 33.

[0056] The inner side surface of the cylinder 341 is fixedly connected with an insert plate 343, which is embedded in the shell 21, and the surface of the insert plate 343 is fixedly connected to the inner side surface of the shell 21. There are several insert plates 343 evenly distributed along the inner side surface of the cylinder 341. The insert plate 343 is inserted into the shell 21 to increase the contact area with the shell 21, so that the heat in the shell 21 is quickly conducted, achieving a better cooling effect.

[0057] Example 2, please refer to Figure 1-Figure 9 The air cooling assembly 33 includes a sleeve 331, which is arranged on a side of the housing 21 close to the rear end cover 31, and the inner side surface of the sleeve 331 is fixedly connected to the surface of the rotating shaft 22, and a rotating rod 332 is arranged on the side of the sleeve 331 away from the rotating shaft 22, and the surface of the rotating rod 332 is fixedly connected to the inner side surface of the sleeve 331, and the surface of the rotating rod 332 is fixedly connected to the fan blade 333. The rotating shaft 22 rotates, driving the sleeve 331 to rotate, driving the rotating rod 332 to rotate, thereby driving the fan blade 333 to rotate, and the fan blade 333 drives the air flow to cool the tail of the motor 2. At the same time, the flowing airflow causes the pressure in the rear end cover 31 to decrease, thereby driving the air flow at the gap of the heat sink 342 to radiate the air cooling effect to the entire housing 21.

[0058] The fan blades 333 are inclined toward the rear end cover 31 , and a plurality of fan blades 333 are evenly distributed along the circumference of the rotating rod 332 . The plurality of fan blades 333 are all arranged inside the rear end cover 31 . The fan blades 333 drive the airflow from the housing 21 to the rear end cover 31 .

[0059] A rotating sleeve 334 is provided at one end of the rotating rod 332 away from the shaft sleeve 331, and the inner side surface of the rotating sleeve 334 is rotatably connected to the surface of the rotating rod 332, and the side of the rotating sleeve 334 away from the rotating rod 332 is fixedly connected to the inner side surface of the rear end cover 31. The rotating sleeve 334 is provided, and the rotating rod 332 rotates inside the rotating sleeve 334, which can limit the rotation of the rotating rod 332 to prevent the fan blades 333 from shaking when in use.

[0060] A shield 335 is provided inside the rear end cover 31, and the holes of the shield 335 are of a different type from the holes of the rear end cover 31. The shield 335 is fixedly connected to the side of the shell 21 close to the rear end cover 31, and the side of the shield 335 away from the shell 21 is fixedly connected to the inner side surface of the rear end cover 31, and the shield 335 is arranged outside a plurality of fan blades 333. The shield 335 protects the fan blades 333 and filters objects close to the fan blades 333 to prevent the fan blades 333 from contacting hard objects and being damaged. The holes of the shield 335 are of a different type from the holes of the rear end cover 31, so that even if hard objects are artificially added, it is difficult to contact the fan blades 333, thereby achieving a better protective effect.

[0061] The inside of the protective shield 335 is inlaid with a metal wire 336, and the metal wire 336 is ring-shaped, and the surface of the metal wire 336 is fixedly connected to the inner side of the protective shield 335. There are several metal wires 336 evenly distributed inside the protective shield 335. The densely distributed metal wires 336, combined with the hole pattern of the protective shield 335, form a more dense filtering structure, which can more effectively prevent the fan blades 333 from contacting the outside world and achieve better protection.

[0062] When in use, the motor 2 is started and the shaft 22 of the motor 2 rotates. The shaft 22 rotates, driving the sleeve 331 to rotate, driving the rotating rod 332 to rotate, thereby driving the fan blades 333 to rotate. The fan blades 333 drive the airflow from the outer shell 21 to the rear end cover 31 to cool the tail of the motor 2. At the same time, the flowing airflow causes the pressure in the rear end cover 31 to decrease, thereby driving the air flow in the gaps of the heat sink 342. The airflow flows between several gaps formed between several stacked heat sinks 342, and the heat on the surface of the outer shell 21 is transferred to the cylinder 341, and then to the heat sink 342, and finally dissipated to the outside.

[0063] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A driving permanent magnet synchronous motor with a heat dissipation mechanism, characterized in that: include: A base (1), wherein a motor (2) is arranged on the top of the base (1), and the outer side surface of the motor (2) is fixedly connected to the inner side surface of the base (1); A heat dissipation device (3), the heat dissipation device (3) being arranged at the rear of the motor (2) and being used for dissipating heat from the rear of the motor (2); Wherein, the motor (2) comprises: A shell (21), the outer side surface of the shell (21) being fixedly connected to the inner side surface of the base (1); A rotating shaft (22), wherein the rotating shaft (22) is arranged inside the housing (21), and both ends of the rotating shaft (22) extend to the outside of the housing (21), and the rotating shaft (22) is fixedly connected to the rotor inside the housing (21); The heat dissipation device (3) comprises: A rear end cover (31), the outer side surface of the rear end cover (31) is fixedly connected to the inner side surface of the base (1), and the rear end cover (31) is arranged at the rear of the housing (21); a copper bar (32), wherein the copper bar (32) is embedded on a side of the rear end cover (31) away from the housing (21), and the inner side surface of the rear end cover (31) is fixedly connected to the surface of the copper bar (32), and the side of the copper bar (32) away from the rear end cover (31) is in contact with the base (1), and the base (1) is grounded; An air cooling component (33), wherein the air cooling component (33) is arranged inside the rear end cover (31), and the air cooling component (33) is fixedly connected to one end of the rotating shaft (22) close to the rear end cover (31); A natural cooling component (34) is disposed around the outside of the outer shell (21), and the inner side surface of the natural cooling component (34) is fixedly connected to the outer side surface of the outer shell (21).

2. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 1, characterized in that: A grounding seat (35) is fixedly connected to a side of the base (1) away from the housing (21), and four grounding seats (35) are provided, and the four grounding seats (35) are used for grounding the base (1).

3. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 2, characterized in that: The natural cooling component (34) comprises a cylinder (341), the inner side surface of the cylinder (341) is fixedly connected to the outer side surface of the outer shell (21), and the outer side surface of the cylinder (341) is fixedly connected to a heat dissipation plate (342).

4. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 3, characterized in that: The heat dissipation plate (342) is arranged in an S shape, and a plurality of the heat dissipation plates (342) are arranged along the circumference of the cylinder (341), and the plurality of heat dissipation plates (342) are stacked on top of each other.

5. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 4, characterized in that: An insert plate (343) is fixedly connected to the inner side surface of the cylinder (341); the insert plate (343) is embedded in the shell (21), and the surface of the insert plate (343) is fixedly connected to the inner side surface of the shell (21); a plurality of the insert plates (343) are evenly distributed along the inner side surface of the cylinder (341).

6. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 5, characterized in that: The air cooling component (33) comprises a shaft sleeve (331), wherein the shaft sleeve (331) is arranged on a side of the housing (21) close to the rear end cover (31), and the inner side surface of the shaft sleeve (331) is fixedly connected to the surface of the rotating shaft (22); a rotating rod (332) is arranged on the side of the shaft sleeve (331) away from the rotating shaft (22), the surface of the rotating rod (332) is fixedly connected to the inner side surface of the shaft sleeve (331), and the surface of the rotating rod (332) is fixedly connected to the fan blade (333).

7. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 6, characterized in that: The fan blades (333) are inclined toward the rear end cover (31), a plurality of the fan blades (333) are evenly distributed along the circumference of the rotating rod (332), and the plurality of the fan blades (333) are all arranged inside the rear end cover (31).

8. The driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 7, characterized in that: A rotating sleeve (334) is provided at one end of the rotating rod (332) away from the shaft sleeve (331), and the inner side surface of the rotating sleeve (334) is rotatably connected to the surface of the rotating rod (332), and the side of the rotating sleeve (334) away from the rotating rod (332) is fixedly connected to the inner side surface of the rear end cover (31).

9. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 8, characterized in that: A shield (335) is arranged inside the rear end cover (31), and the hole of the shield (335) is of a different type from the hole of the rear end cover (31). The shield (335) is fixedly connected to a side of the housing (21) close to the rear end cover (31), and a side of the shield (335) away from the housing (21) is fixedly connected to an inner side surface of the rear end cover (31), and the shield (335) is arranged outside a plurality of blades (333).

10. A driving permanent magnet synchronous motor with a heat dissipation mechanism according to claim 9, characterized in that: A metal wire (336) is embedded inside the protective cover (335), and the metal wire (336) is ring-shaped, and the surface of the metal wire (336) is fixedly connected to the inner side of the protective cover (335), and a plurality of the metal wires (336) are evenly distributed inside the protective cover (335).

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