Motor with good heat dissipation effect

Abstract

The application relates to a motor with good heat dissipation effect, which comprises a shell, a cover, a rotor and a heat dissipation fan, the cover is installed on the shell through bolts, the rotor is coaxially arranged on the shell, the two ends of the rotor are rotationally connected to the shell and the cover respectively, the heat dissipation fan is located on the side of the rotor facing the cover, the heat dissipation fan is arranged on the rotor, an air inlet is arranged on the cover, a plurality of air outlets are arranged on the shell, the plurality of air outlets are distributed in the circumferential direction along the axis of the shell, and an adjusting assembly for controlling the ventilation volume of the air outlets is arranged on the shell. The application has the effect of adapting to the heat dissipation requirements of the motor under different rotating speeds.

Description

Technical Field

[0001] This application relates to the field of electric motors, and more particularly to an electric motor with adjustable exhaust volume. Background Technology

[0002] As the core power device for converting electrical energy into mechanical energy, the electric motor is widely used in many industries such as industrial equipment, civil machinery, and intelligent transmission. When the motor is working, the windings heat up, the core loses heat, and mechanical friction continuously generate heat. If this heat cannot be dissipated in time, the internal temperature of the motor will continue to rise, accelerating insulation aging and grease failure. This not only reduces the motor's operating efficiency and shortens the equipment's lifespan, but in severe cases, it can also lead to winding burnout and rotor jamming. Therefore, a reasonable ventilation and heat dissipation structure is a crucial foundation for ensuring the long-term stable and safe operation of the motor.

[0003] Currently, most speed-regulating motors on the market adopt a self-ventilated cooling structure, relying on a coaxial fan at the tail of the rotor and fixed ventilation holes in the housing for heat dissipation. When the motor rotor rotates, it drives the fan to run synchronously, forming a convective airflow to expel internal heat. In addition, existing technologies also include forced air cooling, auxiliary liquid cooling, and fixed louver ventilation. Among these, the fixed ventilation hole structure is the most commonly used heat dissipation solution for small and medium-sized motors due to its simple structure, low cost, and strong adaptability, and can meet the basic heat dissipation requirements of motors for constant speed and steady-state operation.

[0004] Traditional ventilation holes are fixed structures, and the ventilation area cannot be adaptively adjusted according to the rotor speed and the heat generated by the motor. When the motor is running at low speed, the heat generated is small, but the ventilation holes are completely open, and a large amount of dust and lint enters the motor, which can easily block the air duct and wear parts, resulting in poor dust protection. When the motor is running at high speed and under heavy load, the heat generated increases dramatically, and the ventilation volume of the fixed ventilation holes is insufficient to dissipate heat quickly, resulting in heat accumulation and excessive temperature rise. Summary of the Invention

[0005] To meet the heat dissipation requirements of motors at different speeds, this application provides a motor with good heat dissipation performance.

[0006] This application provides a motor with good heat dissipation, which adopts the following technical solution: A motor with good heat dissipation includes a housing, a cover, a rotor, and a cooling fan. The cover is bolted to the housing. The rotor is coaxially arranged with the housing. Both ends of the rotor are rotatably connected to the housing and the cover, respectively. The cooling fan is located on the side of the rotor facing the cover and is mounted on the rotor. The cover has an air inlet, and the housing has several exhaust vents distributed circumferentially along the axis of the housing. The housing is provided with an adjustment component to control the ventilation volume of the exhaust vents.

[0007] By adopting the above technical solution, and by placing the air inlet on the cover and distributing the air outlet circumferentially along the shell axis on the shell, an airflow organization pattern of front-end air intake and circumferential uniform exhaust is formed. Compared with the traditional rear-end centralized exhaust structure, cold air can enter from the front of the motor and flow more fully through the core heat-generating areas such as the stator winding ends and the iron core air gap, avoiding local airflow dead zones and improving the uniformity of overall convective heat transfer. At the same time, an adjustment component that can control the ventilation volume of the exhaust outlet is provided on the shell, which can dynamically adjust the ventilation cross-sectional area according to the heat generated under different operating conditions of the motor. This effectively alleviates the inherent contradiction of traditional fixed ventilation structures being unable to balance low-speed dust prevention and high-speed heat dissipation, and improves the operating stability and overall heat dissipation efficiency of the motor under complex operating conditions of wide speed and variable load.

[0008] Optionally, the length direction of the exhaust port is parallel to the axial direction of the housing. The adjustment assembly includes two rotating rods, two torsion springs, and a driving component. One end of each of the two rotating rods is rotatably connected to both ends of the exhaust port. The two torsion springs are respectively disposed on the rotating rods. When the rotor is stationary, the two torsion springs cause the two rotating rods to be in the same straight line and block the exhaust port. The driving component is used to drive the rotating rods to rotate against the torsion springs when the rotor rotates.

[0009] By adopting the above technical solution and employing a symmetrical design with dual rotating rods and torsion springs, when the motor is stationary or running at low speed, the preload of the torsion springs keeps the two rotating rods collinear and blocks the exhaust vents, forming a reliable physical barrier. This effectively prevents external dust, fibrous material, and metal debris from entering the motor cavity, significantly improving the motor's dust protection level. When the motor speed increases, the drive unit can drive the rotating rods to overcome the torsion spring force and rotate synchronously, causing the exhaust vent opening to increase linearly with the increase in motor speed and heat generation. This ensures sufficient ventilation and heat dissipation under high-speed and heavy-load conditions. The overall structure is simple and reliable, requiring no additional electrical control devices or external power input.

[0010] Optionally, the driving component includes a driving plate, two driving shafts, a lifting plate, and a mounting rod. The two driving shafts are respectively disposed at both ends of the driving plate. A sliding groove is provided on the rotating rod, which extends along the length of the rotating rod. The two driving shafts are respectively located in the sliding grooves of the two rotating rods. One end of the mounting rod is disposed on the driving plate, and the lifting plate is disposed on the other end of the mounting rod. The airflow movement path of the lifting plate toward the rotor surface is shorter than the airflow movement path of the lifting plate away from the rotor surface.

[0011] By adopting the above technical solution, using an asymmetric airfoil lifting plate as the power source, the aerodynamic lift is generated by the velocity and pressure difference formed when the directional airflow generated by the rotor rotation drives the cooling fan to flow through the two sides of the lifting plate. This is then used to drive the rotating rod to rotate through the drive plate and drive shaft, thus realizing the pure aerodynamic adaptive adjustment of the exhaust port opening. This significantly reduces the vibration, jamming and abnormal noise problems that are prone to occur when the traditional centrifugal adaptive structure is running at high speed. The adjustment process is smooth and stable, and does not increase the mechanical load of the motor shaft system or additional energy consumption.

[0012] Optionally, the surface of the lifting plate facing the rotor is a flat surface, and the surface of the lifting plate away from the rotor is a convex arc-shaped surface.

[0013] By adopting the above technical solution, and designing the side of the lifting plate facing the rotor as a flat surface and the side facing away from the rotor as a convex arc surface, a standard asymmetric airfoil section is constructed. This can effectively improve the velocity difference and pressure difference when the airflow passes through the two sides, enhance the stability and response sensitivity of the aerodynamic lift, and ensure that the lifting plate can generate sufficient driving force to drive the rotating rod to open at a low speed. At the same time, it ensures the balance between the driving force and the torsion spring force under high-speed conditions, so that the opening of the exhaust port remains stable.

[0014] Optionally, the outer wall of the housing is provided with a number of heat dissipation fins, and the number of heat dissipation fins and a number of exhaust vents are alternately distributed.

[0015] By adopting the above technical solution, and by setting heat dissipation fins that are alternately distributed with the exhaust vents on the outer wall of the housing, the effective heat dissipation area of ​​the motor housing is greatly increased. This can efficiently dissipate the heat conducted from inside the generator to the housing, complementing the forced convection heat dissipation of the exhaust vents, and further improving the overall heat dissipation effect of the motor. At the same time, the alternating structure can optimize the airflow field on the surface of the housing and reduce local heat accumulation.

[0016] Optionally, a first cooling oil passage is provided inside the housing, and a second cooling oil passage is provided inside the cover. When the cover is installed on the housing, the first cooling oil passage and the second cooling oil passage are interconnected to form a zigzag disc-shaped oil passage. The housing is provided with an oil inlet and an oil outlet that are connected to the first cooling oil passage.

[0017] By adopting the above technical solution, a first cooling oil circuit and a second cooling oil circuit are respectively set in the housing and the cover. After the cover is installed, they are automatically connected to form a zigzag disc-shaped oil circuit. This significantly increases the flow path length and heat exchange contact area of ​​the cooling oil, enabling the cooling oil to uniformly exchange heat with the motor housing, cover and internal heat-generating components. This effectively reduces the overall temperature inside the motor. Combined with the air-cooling system, it forms a composite heat dissipation system of air cooling and liquid cooling, which greatly improves the upper limit of the motor's heat dissipation and can better meet the heat dissipation requirements under high-speed, heavy-load and long-term operation conditions.

[0018] Optionally, the housing is provided with a first sealing member for blocking the first cooling oil passage, and the cover is provided with a second sealing member for blocking the second cooling oil passage. The first sealing member includes a first sealing plate, a first sliding block, and a first spring. The first sealing plate is slidably connected to the housing along the radial direction of the cover. The first sealing plate is used to block the first cooling oil passage. The first sliding block moves along the axial direction of the housing. The first sliding block faces the side wall of the housing as a guide slope. The distance from the guide slope to the housing gradually decreases along the direction from the housing to the cover. The first sealing plate is slidably connected to the guide slope. The first spring is used when the first sealing plate is at the shortest distance from the guide slope to the cover.

[0019] By adopting the above technical solution, the automatic sealing function of the first cooling oil circuit port is realized through the cooperation of the first sealing plate, the first sliding block and the first spring. When the cover is separated from the shell for maintenance and disassembly, the elastic force of the first spring can push the first sealing plate to slide radially inward, automatically sealing the port of the first cooling oil circuit, reducing the waste and environmental pollution caused by the cooling oil flowing out of the oil circuit, and avoiding the trouble of subsequent filling caused by a large amount of cooling oil loss, which significantly improves the convenience of motor maintenance.

[0020] Optionally, the second sealing component includes a second sealing plate, a second sliding block, and a second spring. The second sealing plate is slidably connected to the housing along the radial direction of the cover. The second sealing plate is used to block the second cooling oil passage. The second sliding block is a guide slope facing the side wall of the cover. The distance from the guide slope to the cover gradually decreases along the direction from the cover to the cover housing. The second sealing plate is slidably connected to the guide slope. The second spring is used when the second sealing plate is at the shortest distance from the guide slope to the cover.

[0021] By adopting the above technical solution and using a design principle symmetrical to the first sealing component, the automatic sealing function of the second cooling oil circuit port is realized through the cooperation of the second sealing plate, the second sliding block and the second spring. When the cover is separated from the shell, the elastic force of the second spring can push the second sealing plate to slide radially inward, automatically sealing the port of the second cooling oil circuit. In cooperation with the first sealing component, the synchronous automatic sealing of both ends of the entire disc-shaped oil circuit is realized, effectively solving the problem of cooling oil loss during motor disassembly and maintenance.

[0022] Optionally, both the first sliding block and the second sliding block are provided with magnets, and the magnets of the first sliding block and the second sliding block attract each other.

[0023] By adopting the above technical solution, and by setting mutually attractive magnets on the first and second sliding blocks, the automatic connection function of the oil circuit is realized. When the cover is installed on the housing, the two sliding blocks move towards each other along the axial direction under the attraction of the magnets. Through their respective guide slopes, they push the first and second sealing plates to slide outward along the radial direction, so that the first cooling oil circuit and the second cooling oil circuit are automatically connected, ensuring that the cooling oil can circulate normally without manual intervention, thus improving the convenience and reliability of motor assembly.

[0024] Optionally, the housing is provided with a sealing ring, and the cover is provided with a sealing groove that mates with the sealing ring.

[0025] By adopting the above technical solution, by setting a sealing ring on the housing and opening a corresponding sealing groove on the cover, the sealing performance at the joint surface between the housing and the cover can be effectively improved, reducing the leakage of cooling oil from the joint surface. At the same time, it can also prevent external dust and moisture from entering the motor, further improving the protection level and operational reliability of the motor.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The exhaust vent is driven by an asymmetric airfoil lift plate, which enables adaptive adjustment of the opening degree with the rotation speed. It requires no electronic control, and takes into account both dust prevention at low speed and heat dissipation at high speed, reducing vibration and abnormal noise at high speed. The air-cooled and liquid-cooled composite heat dissipation system, with heat dissipation fins and zigzag disc-shaped oil circuit working together, improves the heat dissipation limit and is suitable for high-speed and heavy-load conditions. The automatic oil circuit sealing and connection structure reduces the loss of cooling oil during maintenance. Combined with the sealing design, it improves the convenience of assembly and maintenance as well as the reliability of operation. Attached Figure Description

[0027] Figure 1 This is a structural diagram of a motor with good heat dissipation.

[0028] Figure 2 It is a schematic diagram showing the fit between the housing, cover, rotor, and cooling fan.

[0029] Figure 3 yes Figure 1 A schematic diagram of the structure of the adjustment component.

[0030] Figure 4 This is a schematic diagram showing the connection between the first cooling oil passage in the housing and the second cooling oil passage in the cover.

[0031] Figure 5 yes Figure 4 A schematic diagram showing the fit between the first and second sealing components.

[0032] Reference numerals: 1. Housing; 11. Sealing ring; 12. Exhaust vent; 13. First cooling oil passage; 2. Cover; 21. Sealing groove; 22. Air inlet; 23. Second cooling oil passage; 3. Rotor; 4. Cooling fan; 5. Adjustment assembly; 51. Rotating rod; 52. Torsion spring; 53. Drive component; 531. Drive plate; 532. Drive shaft; 533. Lifting plate; 534. Mounting rod; 535. Sliding groove; 6. Heat dissipation fins; 71. Oil inlet; 72. Oil outlet; 8. First sealing component; 81. First sealing plate; 82. First sliding block; 83. First spring; 84. Guide slope; 85. First magnet; 9. Second sealing component; 91. Second sealing plate; 92. Second sliding block; 93. Second spring; 94. Guide slope; 95. Second magnet. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail.

[0034] This application discloses a motor with good heat dissipation. (Refer to...) Figure 1 and Figure 2 A type of motor with good heat dissipation includes a housing 1, a cover 2, a rotor 3, and a cooling fan 4. The housing 1 and the cover 2 are coaxially arranged and the housing 1 is bolted to the cover 2. A sealing ring 11 is fixedly provided on the end face of the housing 1. A sealing groove 21 is formed on the end face of the cover 2 for engaging with the sealing ring 11. The housing 1 and the cover 2 form a cavity. The rotor 3 is coaxially arranged with the housing 1, and its two ends are rotatably connected to the housing 1 and the cover 2, respectively. The cooling fan 4 is located on the side of the rotor 3 facing the cover 2, and is coaxially arranged with the rotor 3. The cooling fan 4 is fixedly mounted on the rotor 3. An air inlet 22 is provided on the top, and several exhaust vents 12 are provided on the periphery of the housing 1. The exhaust vents 12 are evenly distributed circumferentially along the axis of the housing 1, and the length direction of the exhaust vents 12 is parallel to the axis of the housing 1. Several stators are fixedly installed inside the housing 1, and the stators are evenly distributed circumferentially along the axis of the housing 1. The stators and exhaust vents 12 are alternately distributed. An adjustment component 5 for controlling the air volume of the exhaust vents 12 is provided on the housing 1. Several heat dissipation fins 6 are provided on the outer wall of the housing 1. The length direction of the heat dissipation fins 6 is parallel to the axis of the housing 1. The heat dissipation fins 6 and the exhaust vents 12 are alternately distributed along the axis of the housing 1.

[0035] Reference Figure 1 and Figure 3The adjustment assembly 5 includes two rotating rods 51, two torsion springs 52, and a driving component 53. The two rotating rods 51 correspond to the two ends of the exhaust port 12, and one end of each rotating rod 51 is rotatably connected to the two ends of the exhaust port 12. The rotation axis of the rotating rods 51 is parallel to the tangent direction at the corresponding point on the housing 1. The two torsion springs 52 correspond to the two rotating rods 51 and are coaxially arranged with the rotation axis of the rotating rods 51. One end of the torsion spring 52 is fixedly mounted on the rotating rod 51, and the other end of the torsion spring 52 is fixedly mounted on the housing 1. The driving component 53 includes a driving plate 531, two driving shafts 532, a lifting plate 533, and a mounting rod 534. A sliding groove 535 is provided on the rotating rod 51, and the sliding groove 535 is oriented along the rotation axis. The moving rod 51 extends along its length, and two drive shafts 532 are respectively fixedly mounted on both ends of the drive plate 531. The two ends of the drive plate 531 correspond to the two rotating rods 51. The drive shafts 532 are located in the sliding grooves 535 of the corresponding rotating rods 51. The drive plate 531 slides along the radial direction of the housing 1 and is connected to the housing 1. One end of the mounting rod 534 is fixedly mounted on the drive plate 531, and the lifting plate 533 is fixedly mounted on the other end of the mounting rod 534. The surface of the lifting plate 533 facing the rotor 3 is a flat surface, and the surface of the lifting plate 533 away from the rotor 3 is a convex arc-shaped surface. The airflow movement path of the lifting plate 533 facing the rotor 3 is shorter than the airflow movement path of the lifting plate 533 away from the rotor 3.

[0036] Reference Figure 4 The housing 1 is provided with a first cooling oil passage 13, and the cover 2 is provided with a second cooling oil passage 23. When the cover 2 is installed on the housing 1, the first cooling oil passage 13 and the second cooling oil passage 23 are connected to form a zigzag disc-shaped oil passage. The housing 1 is provided with an oil inlet 71 and an oil outlet 72 that are connected to the first cooling oil passage 13.

[0037] Reference Figure 5The housing 1 is provided with a plurality of first sealing elements 8 for blocking the first cooling oil passage 13, and the cover 2 is provided with a plurality of second sealing elements 9 for blocking the second cooling oil passage 23. Each first sealing element 8 includes a first sealing plate 81, a first sliding block 82, and a first spring 83. The first sealing plate 81 is slidably connected to the housing 1 along the radial direction of the housing 1 and is used to block the first cooling oil passage 13. The first sliding block 82 is slidably connected to the outer wall of the housing 1 along the axial direction of the housing 1. 82 faces the side wall of the housing 1 and forms a guide slope 84. The distance from the guide slope 84 to the housing 1 gradually decreases along the direction from the housing 1 to the cover 2. The first sealing plate 81 is slidably connected to the guide slope 84. The length direction of the first spring 83 is parallel to the sliding direction of the first sliding block 82. One end of the first spring 83 is fixedly set on the first sliding block 82, and the other end of the first spring 83 is fixedly set on the housing 1. The first spring 83 is used to keep the first sealing plate 81 at the shortest distance from the guide slope 84 to the housing 1.

[0038] Reference Figure 5 The second sealing element 9 includes a second sealing plate 91, a second sliding block 92, and a second spring 93. The second sealing plate 91 is slidably connected to the cover 2 along the radial direction of the cover 2 and is used to block the second cooling oil passage 23. The second sliding block 92 is slidably connected to the outer wall of the cover 2 along the axial direction of the cover 2. The second sliding block 92 has a guide slope 94 facing the side wall of the cover 2. The distance from the guide slope 94 to the cover 2 gradually decreases along the direction from the cover 2 to the housing 1. The second sealing plate 91 is slidably connected to the guide slope 94. The length direction of the second spring 93 is parallel to the second sealing plate 91. The sliding direction of the two sliding blocks 92, one end of the second spring 93 is fixedly set on the second sliding block 92, and the other end of the second spring 93 is fixedly set on the cover 2. The second spring 93 is used to keep the second sealing plate 91 at the shortest distance from the guide slope 94 to the cover 2. Magnets are fixedly set on both the first sliding block 82 and the second sliding block 92. The magnet corresponding to the first sliding block 82 is the first magnet 85, and the magnet corresponding to the second sliding block 92 is the second magnet 95. The magnetic poles of the first magnet 85 and the second magnet 95 are opposite, and the first magnet 85 and the second magnet 95 attract each other.

[0039] The implementation principle of a motor with good heat dissipation in this application embodiment is as follows: after the motor is powered on and running, the rotor 3 drives the cooling fan 4 to rotate synchronously. The fan stirs the air inside the cavity, and the outside air enters the motor cavity through the air inlet 22 of the cover 2. After being heated, the air is discharged outward from the exhaust port 12 arranged around the shell 1, forming a through-type convection air duct. The airflow generated by the fan continuously blows onto the lift plate 533. The airfoil structure of the lift plate 533, with one side flat and the other side convex, creates a pressure difference due to the different airflow velocities on both sides. The pressure difference generates aerodynamic thrust, which drives the drive plate 531 to move radially along the housing 1 via the mounting rod 534. The drive shafts 532 at both ends of the drive plate 531 slide in the sliding grooves 535 of the rotating rod 51, pulling the two rotating rods 51 to overcome the elastic force of the torsion spring 52 and flip outward, thus opening the exhaust port 12. The higher the motor speed, the greater the airflow velocity and lift, the greater the flipping amplitude of the rotating rod 51, and the larger the ventilation area of ​​the exhaust port 12, thus improving the exhaust heat dissipation capacity. When the motor stops or runs at low speed, the airflow force is insufficient, and the torsion spring 52 rebounds, pulling the two rotating rods 51 back to their original position and closing, blocking the exhaust port 12 and preventing dust and impurities from entering the cavity. The heat dissipation fins 6 on the outer wall of the casing 1 and the exhaust port 12 are arranged alternately to increase the heat exchange area of ​​the casing 1 and directly dissipate the heat stored in the casing 1 into the environment, which, together with the convection cooling, enhances the overall heat dissipation.

[0040] In the assembled state, the first cooling oil passage 13 of the housing 1 and the second cooling oil passage 23 of the cover 2 are connected to form a zigzag disc-shaped oil passage. Cooling oil is injected from the oil inlet 71 and circulates along the disc-shaped oil passage. Relying on the large-area oil passage, it carries away the heat conducted by the housing 1 and the cover 2, forming a combined air-cooling and liquid-cooling heat dissipation structure. The sealing ring 11 of the housing 1 and the sealing groove 21 of the cover 2 engage with each other to seal the assembly gaps and reduce cooling oil leakage and the infiltration of water vapor and dust.

[0041] When the housing 1 and cover 2 are disassembled, the first sliding block 82 and the second sliding block 92 lose the constraint of the magnets attracting each other. The first spring 83 and the second spring 93 respectively push the first sliding block 82 and the second sliding block 92 to move axially. With the help of the inclined plane transmission, the first sealing plate 81 and the second sealing plate 91 are pushed to radially seal the corresponding oil circuit ports to prevent the cooling oil in the oil circuit from leaking out. After the housing 1 and cover 2 are reassembled and fitted, the magnets on the two sliding blocks attract each other and move towards each other. The inclined plane drives the sealing plate to retract and open the oil circuit. The first cooling oil circuit 13 and the second cooling oil circuit 23 are connected again, and the cooling oil resumes normal circulation.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A motor with good heat dissipation, characterized in that: The device includes a housing (1), a cover (2), a rotor (3), and a cooling fan (4). The cover (2) is bolted to the housing (1). The rotor (3) is coaxially arranged with the housing (1). The two ends of the rotor (3) are rotatably connected to the housing (1) and the cover (2), respectively. The cooling fan (4) is located on the side of the rotor (3) facing the cover (2). The cooling fan (4) is arranged on the rotor (3). The cover (2) has an air inlet (22). The housing (1) has several exhaust ports (12). The exhaust ports (12) are distributed circumferentially along the axis of the housing (1). The housing (1) is provided with an adjustment component (5) for controlling the ventilation volume of the exhaust ports (12).

2. The motor with good heat dissipation effect according to claim 1, characterized in that: The length direction of the exhaust port (12) is parallel to the axis of the housing (1). The adjustment component (5) includes two rotating rods (51), two torsion springs (52) and a driving component (53). One end of each of the two rotating rods (51) is rotatably connected to both ends of the exhaust port (12). The two torsion springs (52) are respectively set on the rotating rods (51). When the rotor (3) is stationary, the two torsion springs (52) make the two rotating rods (51) lie on the same straight line and block the exhaust port (12). The driving component (53) is used to drive the rotating rods (51) to rotate against the torsion springs (52) when the rotor (3) rotates.

3. The motor with good heat dissipation effect according to claim 2, characterized in that: The drive unit (53) includes a drive plate (531), two drive shafts (532), a lifting plate (533), and a mounting rod (534). The two drive shafts (532) are respectively disposed at both ends of the drive plate (531). A sliding groove (535) is provided on the rotating rod (51). The sliding groove (535) extends along the length direction of the rotating rod (51). The two drive shafts (532) are respectively located in the sliding grooves (535) of the two rotating rods (51). One end of the mounting rod (534) is disposed on the drive plate (531). The lifting plate (533) is disposed on the other end of the mounting rod (534). The airflow movement path of the lifting plate (533) toward the surface of the rotor (3) is shorter than the airflow movement path of the lifting plate (533) away from the surface of the rotor (3).

4. The motor with good heat dissipation effect according to claim 3, characterized in that: The surface of the lifting plate (533) facing the rotor (3) is a flat surface, and the surface of the lifting plate (533) away from the rotor (3) is a convex arc-shaped surface.

5. The motor with good heat dissipation effect according to claim 1, characterized in that: The outer wall of the housing (1) is provided with a number of heat dissipation fins (6), and the number of heat dissipation fins (6) and the number of exhaust vents (12) are alternately distributed.

6. The motor with good heat dissipation effect according to claim 1, characterized in that: The housing (1) is provided with a first cooling oil passage (13), and the cover (2) is provided with a second cooling oil passage (23). When the cover (2) is installed on the housing (1), the first cooling oil passage (13) and the second cooling oil passage (23) are connected to each other to form a zigzag disc-shaped oil passage. The housing (1) is provided with an oil inlet (71) and an oil outlet (72) connected to the first cooling oil passage (13).

7. The motor with good heat dissipation effect according to claim 6, characterized in that: The housing (1) is provided with a first sealing member (8) for blocking the first cooling oil passage (13), and the cover (2) is provided with a second sealing member (9) for blocking the second cooling oil passage (23). The first sealing member (8) includes a first sealing plate (81), a first sliding block (82), and a first spring (83). The first sealing plate (81) is slidably connected to the housing (1) in the radial direction of the housing (1), and the first sealing plate (81) is used to block the first cooling oil passage. (13) The first sliding block (82) moves along the axis of the housing (1). The first sliding block (82) faces the side wall of the housing (1) as a guide slope (84). The distance from the guide slope (84) to the housing (1) gradually decreases along the direction from the housing (1) to the cover (2). The first sealing plate (81) is slidably connected to the guide slope (84). The first spring (83) is used to position the first sealing plate (81) at the shortest distance from the guide slope (84) to the housing (1).

8. The motor with good heat dissipation effect according to claim 7, characterized in that: The second sealing component (9) includes a second sealing plate (91), a second sliding block (92), and a second spring (93). The second sealing plate (91) is slidably connected to the housing (1) along the radial direction of the cover (2). The second sealing plate (91) is used to block the second cooling oil passage (23). The second sliding block (92) is a guide slope (94) facing the side wall of the cover (2). The distance from the guide slope (94) to the cover (2) gradually decreases along the direction from the cover (2) to the housing (1). The second sealing plate (91) is slidably connected to the guide slope (94). The second spring (93) is used to position the second sealing plate (91) at the shortest distance from the guide slope (94) to the cover (2).

9. The motor with good heat dissipation effect according to claim 8, characterized in that: Magnets are respectively provided on the first sliding block (82) and the second sliding block (92), and the magnets of the first sliding block (82) and the second sliding block (92) attract each other.

10. The motor with good heat dissipation effect according to claim 1, characterized in that: The housing (1) is provided with a sealing ring (11), and the cover (2) is provided with a sealing groove (21) that cooperates with the sealing ring (11).

Images